What's In My Jar
Sarah Chapman Platinum Pep8 Stem Cell Serum
Sarah Chapman

Sarah Chapman Platinum Pep8 Stem Cell Serum

Efficacy75/100IrritancyMedium
See all ingredients

Works for

Moisturizing
Acetyl octapeptide-3, Palmitoyl tetrapeptide-7 + 36 more
Works well
What the product description says
“hyaluronic acid helps to restore lost volume and hydration.”
Source: SpaceNK

This product can help improve hydration of the skin with the two types of ingredients.

The first type is called “humectants”:
these ingredients help attract water. When humectants are on the surface of the skin, they “pull in” the moisture from the outside environment, or from within deeper layers of the skin. The following ingredients in this product do the job: alanine, arginine.

This product also contains ingredients called “occlusives”. They help reduce the speed with which our skin loses moisture to the outside environment. These ingredients also help soften the upper layer of the skin, so it feels less tight and nicer to the touch. The following ingredients in this product do the job: arginine, glycine soja protein.

The following ingredients in this product are especially good for supporting the skin barrier and helping with the hydration level: acetyl hexapeptide-8, acetyl octapeptide-3, acetyl tetrapeptide-17, dipeptide diaminobutyroyl benzylamide diacetate, dipeptide-2, n-prolyl palmitoyl tripeptide-56 acetate, palmitoyl tetrapeptide-7, palmitoyl tripeptide-1, palmitoyl tripeptide-5

Acetyl octapeptide-3Hero· HumectantEffect: HighA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~4–4.8%
Palmitoyl tetrapeptide-7Hero· EmollientEffect: HighA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.3–0.5%
Dipeptide diaminobutyroyl benzylamide diacetateHeroEffect: HighA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.25–0.45%
N-prolyl palmitoyl tripeptide-56 acetateHeroEffect: HighA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.25–0.4%
Palmitoyl tripeptide-1Hero· EmollientEffect: HighA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.25–0.45%
Palmitoyl tripeptide-5HeroEffect: HighA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.25–0.45%
Acetyl hexapeptide-8Hero· HumectantEffect: HighA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.25–0.45%
Dipeptide-2HeroEffect: HighA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.2–0.35%
Acetyl tetrapeptide-17HeroEffect: HighA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.15–0.25%
GlycerinKey active· HumectantEffect: HighOne of the best moisturizing ingredients. Naturally present in skin. It attracts water to the upper layer of the skin working as a humectant~4.5–5.5%
Imperata cylindrica root extractKey active· HumectantEffect: HighA plat extract that might help neutralize free radicals in skin and attract water to its upper layer~0.65–0.95%
Hydrolyzed rice proteinKey active· HumectantEffect: MediumHelps attract water to the upper layer of the skin. Might have some anti-oxidant properties~0.4–0.6%
ArginineKey active· Humectant, OcclusiveEffect: HighAn amino acid that is naturally present in skin and helps keep it hydrated. When used together with AHAs, it can reduce their irritating effect on the skin~0.35–0.6%
Lysine hclKey activeEffect: High~0.25–0.45%
Histidine hclKey activeEffect: HighA salt of an amino-acid that helps attract water to the upper layer of the skin. Might be helpful in restoring the skin barrier function~0.25–0.45%
GlycineKey active· HumectantEffect: HighHelps to attract water to the upper layer of the skin and can help restore the skin barrier function~0.25–0.45%
SerineKey activeEffect: HighAn amino-acid that helps to attract water to the upper layer of the skin. In combination with other amino-acids, might help to reduce fine lines and wrinkles~0.25–0.45%
Sodium hyaluronateKey active· HumectantEffect: HighOne of the best moisturizing ingredients. Attracts water into the upper layer of the skin~0.25–0.45%
Superoxide dismutaseKey activeEffect: HighAn antioxidant enzyme that is naturally present in skin. It can help support skin barrier function and reduce inflammation in skin. It is used in topical medications for inflammatory skin conditions including atopic dermatitis (eczema) and psoriasis. There are three types of natural Superoxide Dismutase in human skin. The compound used in topical treatments and cosmetics are mimics of typically one of these natural variants~0.25–0.45%
ThreonineKey activeEffect: HighAn amino-acid that helps to attract water to the upper layer of the skin. In combination with other amino-acids, might help to reduce fine lines and wrinkles~0.25–0.45%
AlanineKey active· HumectantEffect: HighAn amino-acid that helps to attract water to the upper layer of the skin and might help to lighten the skin, but solid evidence is lacking~0.25–0.45%
Glutamic acidKey active· HumectantEffect: HighAn amino-acid that helps attract water to the upper layer of the skin~0.25–0.45%
Hydrolyzed vegetable proteinKey activeEffect: Medium~0.25–0.45%
ProlineKey activeEffect: Medium~0.25–0.45%
Glycine soja proteinKey active· Humectant, EmollientEffect: MediumA plant extract that helps to attract water to the upper layer of the skin and soften it. It might be helpful in neutralizing free radicals. It might be somewhat helpful for evening out the skin tone. It might be able to support elastin production but solid research is lacking~0.25–0.5%
Hydrolyzed wheat proteinKey active· HumectantEffect: MediumCan help attract water to the upper layer of the skin. Avoid if sensitive to gluten~0.25–0.45%
IsoleucineKey activeEffect: HighAn amino acid that can help attract water to the upper layer of the skin and support skin's barrier function~0.2–0.4%
Glyceryl polymethacrylate· Humectant, EmollientEffect: LowUsed to create a nice product texture~3–3.6%
Peg-8 dimethiconeEffect: LowA type of silicone that can help create nice product texture and soften the upper layer of the skin~2.2–2.7%
Pentylene glycol· EmollientEffect: LowUsed to preserve products, dissolve other ingredients and create a nice product texture~1.9–2.3%
Propylene glycol· HumectantEffect: LowHelps oil and water mix together and can enhance the penetration of other ingredients into the skin. It can be irritating~1.3–1.6%
Glyceryl caprylate· EmollientEffect: LowAn emollient that can also help water and oil mix together, as well as prevent bacteria growth in products~1.1–1.4%
Caprylyl glycol· Humectant, EmollientEffect: LowHelps preserve products and creates a nice product texture~0.25–0.5%
Camellia sinensis leaf extractEffect: LowCan contain potent anti-oxidant compounds (abbreviated ECG, GCG, EGC, and EGCG) that might help protect the skin from free radicals. Can help calm down inflammation and has some anti-bacterial properties. Unfortunately, these antioxidants are unstable and lose their effectiveness very quickly in products. The concentration of the antioxidant compounds in the extract also tends to be low to be effective in topical formulation~0.25–0.5%
BiotinEffect: LowMight have some moisturising properties. Is not effective when applied topically beyond some moisturizing effect~0.15–0.3%
LecithinEffect: Low, below effective doseUsed mostly for creating emulsions - helping oil and water mix together. Helps soften the upper layer of the skin~0.4–0.6%
Laminaria digitata extractUnder-dosedSeaweed extract that helps the skin to attract water and make it more smooth for touch. Also shows promise of anti-aging properties, but good research is lacking at the moment~0.25–0.45%
AllantoinUnder-dosedHelps calm down inflammation in skin and can help reduce itching. Helps to repair the skin barrier and keep skin hydrated~0.2–0.4%
Anti-aging
Acetyl octapeptide-3, Palmitoyl tetrapeptide-7 + 12 more
May help
What the product description says
“With eight potent peptides that work to support the skin's natural production of collagen, this serum helps to visibly reduce the look of wrinkles, neutralise free radicals and promote a more even toned and supple appearance.”
Source: SpaceNK

This product contains acetyl hexapeptide-8, acetyl octapeptide-3, acetyl tetrapeptide-17, dipeptide diaminobutyroyl benzylamide diacetate, dipeptide-2, n-prolyl palmitoyl tripeptide-56 acetate, palmitoyl tetrapeptide-7, palmitoyl tripeptide-1, palmitoyl tripeptide-5, serine, threonine. These ingredients might be able to help reduce and prevent fine lines and wrinkles, improve skin elasticity and firmness, but there is not enough evidence that it actually works.

Acetyl octapeptide-3Key activeEffect: MediumA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~4–4.8%
Palmitoyl tetrapeptide-7Key activeEffect: MediumA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.3–0.5%
Acetyl hexapeptide-8Key activeEffect: MediumA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.25–0.45%
Palmitoyl tripeptide-5Key activeEffect: MediumA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.25–0.45%
SerineKey activeEffect: MediumAn amino-acid that helps to attract water to the upper layer of the skin. In combination with other amino-acids, might help to reduce fine lines and wrinkles~0.25–0.45%
ThreonineKey activeEffect: MediumAn amino-acid that helps to attract water to the upper layer of the skin. In combination with other amino-acids, might help to reduce fine lines and wrinkles~0.25–0.45%
Dipeptide diaminobutyroyl benzylamide diacetateKey activeEffect: MediumA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.25–0.45%
N-prolyl palmitoyl tripeptide-56 acetateKey activeEffect: MediumA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.25–0.4%
Palmitoyl tripeptide-1Key activeEffect: MediumA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.25–0.45%
Dipeptide-2Key activeEffect: MediumA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.2–0.35%
Acetyl tetrapeptide-17Key activeEffect: MediumA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.15–0.25%
Camellia sinensis leaf extractEffect: LowCan contain potent anti-oxidant compounds (abbreviated ECG, GCG, EGC, and EGCG) that might help protect the skin from free radicals. Can help calm down inflammation and has some anti-bacterial properties. Unfortunately, these antioxidants are unstable and lose their effectiveness very quickly in products. The concentration of the antioxidant compounds in the extract also tends to be low to be effective in topical formulation~0.25–0.5%
Glycine soja proteinEffect: LowA plant extract that helps to attract water to the upper layer of the skin and soften it. It might be helpful in neutralizing free radicals. It might be somewhat helpful for evening out the skin tone. It might be able to support elastin production but solid research is lacking~0.25–0.5%
Laminaria digitata extractEffect: Low, below effective doseSeaweed extract that helps the skin to attract water and make it more smooth for touch. Also shows promise of anti-aging properties, but good research is lacking at the moment~0.25–0.45%
Evens skin tone
Glycine soja protein, Alanine + 2 more
Not delivered
What the product description says
“With eight potent peptides that work to support the skin's natural production of collagen, this serum helps to visibly reduce the look of wrinkles, neutralise free radicals and promote a more even toned and supple appearance.”
Source: SpaceNK

This product contains ingredients (alanine, glycine soja protein) that could help reduce hyperpigmentation (for example, post-acne marks or age spots) in theory, but there is not enough evidence that they actually work.

Glycine soja proteinEffect: LowA plant extract that helps to attract water to the upper layer of the skin and soften it. It might be helpful in neutralizing free radicals. It might be somewhat helpful for evening out the skin tone. It might be able to support elastin production but solid research is lacking~0.25–0.5%
AlanineEffect: LowAn amino-acid that helps to attract water to the upper layer of the skin and might help to lighten the skin, but solid evidence is lacking~0.25–0.45%
TaurineEffect: LowCould be helpful in reducing inflammation in skin, evening out the skin tone and neutralizing free radicals, but more research is needed to confirm its effectiveness~0.25–0.45%
Camellia sinensis leaf extractEffect: LowCan contain potent anti-oxidant compounds (abbreviated ECG, GCG, EGC, and EGCG) that might help protect the skin from free radicals. Can help calm down inflammation and has some anti-bacterial properties. Unfortunately, these antioxidants are unstable and lose their effectiveness very quickly in products. The concentration of the antioxidant compounds in the extract also tends to be low to be effective in topical formulation~0.25–0.5%
Anti-oxidation
Side benefit · Imperata cylindrica root extract, Superoxide dismutase + 7 more
Works well

This product contains antioxidants (superoxide dismutase) that can help neutralize free radicals in skin. By doing so, they can lessen the damage the skin gets from the UV light (sun).

The following ingredients - camellia sinensis leaf extract, imperata cylindrica root extract also can have an antioxidant effect, but there is less evidence to confirm their effectiveness in skin.

Imperata cylindrica root extractKey activeEffect: MediumA plat extract that might help neutralize free radicals in skin and attract water to its upper layer~0.65–0.95%
Superoxide dismutaseKey activeEffect: HighAn antioxidant enzyme that is naturally present in skin. It can help support skin barrier function and reduce inflammation in skin. It is used in topical medications for inflammatory skin conditions including atopic dermatitis (eczema) and psoriasis. There are three types of natural Superoxide Dismutase in human skin. The compound used in topical treatments and cosmetics are mimics of typically one of these natural variants~0.25–0.45%
Camellia sinensis leaf extractKey activeEffect: MediumCan contain potent anti-oxidant compounds (abbreviated ECG, GCG, EGC, and EGCG) that might help protect the skin from free radicals. Can help calm down inflammation and has some anti-bacterial properties. Unfortunately, these antioxidants are unstable and lose their effectiveness very quickly in products. The concentration of the antioxidant compounds in the extract also tends to be low to be effective in topical formulation~0.25–0.5%
Hydrolyzed rice proteinEffect: LowHelps attract water to the upper layer of the skin. Might have some anti-oxidant properties~0.4–0.6%
TaurineEffect: LowCould be helpful in reducing inflammation in skin, evening out the skin tone and neutralizing free radicals, but more research is needed to confirm its effectiveness~0.25–0.45%
Hesperidin methyl chalconeEffect: LowMight help neutralize free radicals in skin. Is claimed to be able to improve the appearance of undereye darkness but evidence is missing. Can be an allergen and cause irritation~0.25–0.45%
Glycine soja proteinEffect: LowA plant extract that helps to attract water to the upper layer of the skin and soften it. It might be helpful in neutralizing free radicals. It might be somewhat helpful for evening out the skin tone. It might be able to support elastin production but solid research is lacking~0.25–0.5%
Olea europaea leaf extractEffect: LowA plant extract that might have some anti-oxidant and anti-inflammatory properties but evidence for effectiveness in skin is missing~0.25–0.5%
Laminaria digitata extractEffect: Low, below effective doseSeaweed extract that helps the skin to attract water and make it more smooth for touch. Also shows promise of anti-aging properties, but good research is lacking at the moment~0.25–0.45%

Can it cause trouble?

Irritancy
23 flagged ingredients
Medium risk
We flagged 23 ingredients with irritancy potential. Severity depends on your sensitivity threshold; the table lists the worst offenders first.
IngredientFunctionIrritationEst. amount
Propylene glycolHelps oil and water mix together and can enhance the penetration of other ingredients into the skin. It can be irritatingHigh~1.3–1.6%est.
PullulanCreates a thin drying film on the skin resulting in a short-term tightening effectHigh~0.25–0.5%est.
Hesperidin methyl chalconeMight help neutralize free radicals in skin. Is claimed to be able to improve the appearance of undereye darkness but evidence is missing. Can be an allergen and cause irritationHigh~0.25–0.45%est.
Benzyl alcoholA preservative. Can be used to mask unpleasant smell. Can be irritatingHigh~0.2–0.4%est.
Pentylene glycolUsed to preserve products, dissolve other ingredients and create a nice product textureMedium~1.9–2.3%est.
Peg-40 hydrogenated castor oilHelps oil and water mix togetherMedium~1.5–1.9%est.
Triethyl citrateUsed as a fragrance. Rarely causes irritationMedium~0.8–1.15%est.
Imperata cylindrica root extractA plat extract that might help neutralize free radicals in skin and attract water to its upper layerMedium~0.65–0.95%est.
Benzoic acidA preservativeMedium~0.25–0.5%est.
Olea europaea leaf extractA plant extract that might have some anti-oxidant and anti-inflammatory properties but evidence for effectiveness in skin is missingMedium~0.25–0.5%est.
Steareth-20Helps oil and water mix togetherMedium~0.5–0.75%est.
TaurineCould be helpful in reducing inflammation in skin, evening out the skin tone and neutralizing free radicals, but more research is needed to confirm its effectivenessMedium~0.25–0.45%est.
Disodium edtaStabilizes the product formulationMedium~0.2–0.4%est.
Hydrolyzed wheat proteinCan help attract water to the upper layer of the skin. Avoid if sensitive to glutenMedium~0.25–0.45%est.
Caprylyl glycolHelps preserve products and creates a nice product textureMedium~0.25–0.5%est.
Potassium sorbateA preservativeMedium~0.25–0.45%est.
Chlorhexidine digluconateA preservativeMedium~0.15–0.3%est.
PvpHelps evenly disperse other ingredients in a formulation and create an even layer on the surface of the skinMedium~0.25–0.5%est.
Sodium citrateHelps to control the skin's pH level. Maintains the skin's natural film of amino-lactic acids and oils. Helps to preserve productsMedium~0.25–0.45%est.
Citric acidCan work as an exfoliant but is typically used to adjust the product pHMedium~0.25–0.45%est.
Acrylates/c10-30 alkyl acrylate crosspolymerMaintains the texture of skincare products. Allows the product to spread evenly. Helps oil and water mix togetherMedium~0.2–0.4%est.
Polysorbate 60Helps oil and water mix togetherMedium~0.2–0.35%est.
EthylhexylglycerinA preservativeMedium~0.1–0.15%est.
Comedogenic
2 ingredients rated 2 or more on the 0–5 pore-clogging scale
2 flagged
These ingredients have a comedogenic rating of 2 or more on a 0–5 scale; the table shows each one's rating. In leave-on products they can clog pores in acne-prone skin.
IngredientFunctionRatingEst. amount
Laminaria digitata extractSeaweed extract that helps the skin to attract water and make it more smooth for touch. Also shows promise of anti-aging properties, but good research is lacking at the moment3/5~0.25–0.45%est.
Macrocystis pyrifera extract—3/5~0.25–0.45%est.
Alternatives
The closest match we found
Serum & Treatment Skinesis Platinum Pep⁸ Stem Cell Serum
Sarah Chapman London Serum & Treatment Skinesis Platinum Pep⁸ Stem Cell Serum
Closest match74% match
View all alternatives

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Ingredients

Filter by role to see what each ingredient is doing.

Water~45–55%
Formula
Irritation risk
Low

Plain old water

More about Water
Glycerin~4.5–5.5%
Key active
Irritation risk
Low
Works for
Moisturizing

One of the best moisturizing ingredients. Naturally present in skin. It attracts water to the upper layer of the skin working as a humectant

More about Glycerin
Acetyl octapeptide-3~4–4.8%
Hero · Moisturizing
Irritation risk
Low
Works for
MoisturizingAnti-aging

A type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles

More about Acetyl octapeptide-3
Glyceryl polymethacrylate~3–3.6%
Formula
Irritation risk
Low
Works for
Moisturizing

Used to create a nice product texture

More about Glyceryl polymethacrylate
Peg-8 dimethicone~2.2–2.7%
Formula
Irritation risk
Low
Works for
Moisturizing

A type of silicone that can help create nice product texture and soften the upper layer of the skin

More about Peg-8 dimethicone
Pentylene glycol~1.9–2.3%
Irritant · medium
Irritation risk
Medium
Works for
Moisturizing

Used to preserve products, dissolve other ingredients and create a nice product texture

More about Pentylene glycol
Peg-40 hydrogenated castor oil~1.5–1.9%
Irritant · medium
Irritation risk
Medium
Works for
Cleansing

Helps oil and water mix together

More about Peg-40 hydrogenated castor oil
Propylene glycol~1.3–1.6%
Irritant · high
Irritation risk
High
Works for
Moisturizing

Helps oil and water mix together and can enhance the penetration of other ingredients into the skin. It can be irritating

More about Propylene glycol
Glyceryl caprylate~1.1–1.4%
Formula
Irritation risk
Low
Works for
CleansingMoisturizing

An emollient that can also help water and oil mix together, as well as prevent bacteria growth in products

More about Glyceryl caprylate
Triethyl citrate~0.8–1.15%
Irritant · medium
Irritation risk
Medium

Used as a fragrance. Rarely causes irritation

More about Triethyl citrate
Imperata cylindrica root extract~0.65–0.95%
Key activeIrritant · medium
Irritation risk
Medium
Works for
MoisturizingAnti-oxidationAnti-inflammatory

A plat extract that might help neutralize free radicals in skin and attract water to its upper layer

More about Imperata cylindrica root extract
Benzoic acid~0.25–0.5%
Irritant · medium
Irritation risk
Medium

A preservative

More about Benzoic acid
Xanthan gum~0.45–0.7%
Formula
Irritation risk
Low
Works for
Cleansing

Used to create a thicker product consistency

More about Xanthan gum
Hydrolyzed rice protein~0.4–0.6%
Key active
Irritation risk
Low
Works for
MoisturizingAnti-oxidation

Helps attract water to the upper layer of the skin. Might have some anti-oxidant properties

More about Hydrolyzed rice protein
Arginine~0.35–0.6%
Key active
Irritation risk
Low
Works for
Moisturizing

An amino acid that is naturally present in skin and helps keep it hydrated. When used together with AHAs, it can reduce their irritating effect on the skin

More about Arginine
Sclerotium gum~0.3–0.6%
Formula
Irritation risk
Low

Used to create gel-like formulas and stabilize emulsions

More about Sclerotium gum
Lecithin~0.4–0.6%
Formula
Irritation risk
Low
Works for
CleansingMoisturizing

Used mostly for creating emulsions - helping oil and water mix together. Helps soften the upper layer of the skin

More about Lecithin
Olea europaea leaf extract~0.25–0.5%
Irritant · medium
Irritation risk
Medium
Works for
Anti-oxidation

A plant extract that might have some anti-oxidant and anti-inflammatory properties but evidence for effectiveness in skin is missing

More about Olea europaea leaf extract
Steareth-20~0.5–0.75%
Irritant · medium
Irritation risk
Medium
Works for
Cleansing

Helps oil and water mix together

More about Steareth-20
Pullulan~0.25–0.5%
Irritant · high
Irritation risk
High
Works for
Mattifying

Creates a thin drying film on the skin resulting in a short-term tightening effect

More about Pullulan
Taurine~0.25–0.45%
Irritant · medium
Irritation risk
Medium
Works for
Anti-oxidationAnti-inflammatoryAnti-blemishEvens skin tone

Could be helpful in reducing inflammation in skin, evening out the skin tone and neutralizing free radicals, but more research is needed to confirm its effectiveness

More about Taurine
Phenoxyethanol~0.25–0.45%
Formula
Irritation risk
Low

A preservative. It helps prevent bacterial growth in cosmetic products

More about Phenoxyethanol
Disodium edta~0.2–0.4%
Irritant · medium
Irritation risk
Medium

Stabilizes the product formulation

More about Disodium edta
Gardenia jasminoides meristem cell culture extract~0.2–0.35%
Formula
Irritation risk
Low
More about Gardenia jasminoides meristem cell culture extract
Hydroxyethylcellulose~0.25–0.45%
Formula
Irritation risk
Low

Used to thicken product formulations and create gel-like textures

More about Hydroxyethylcellulose
Laminaria digitata extract~0.25–0.45%
Under-dosedComedogenic 3/5
Irritation risk
Low
Comedogenicity
3/5
Works for
MoisturizingAnti-oxidationAnti-aging

Seaweed extract that helps the skin to attract water and make it more smooth for touch. Also shows promise of anti-aging properties, but good research is lacking at the moment

More about Laminaria digitata extract
Hydrolyzed wheat protein~0.25–0.45%
Key activeIrritant · medium
Irritation risk
Medium
Works for
Moisturizing

Can help attract water to the upper layer of the skin. Avoid if sensitive to gluten

More about Hydrolyzed wheat protein
Silica~0.35–0.65%
Formula
Irritation risk
Low

Used to absorb oil and can temporarily mattify skin

More about Silica
Sodium benzoate~0.25–0.45%
Formula
Irritation risk
Low

A preservative

More about Sodium benzoate
Dipeptide diaminobutyroyl benzylamide diacetate~0.25–0.45%
Hero · Moisturizing
Irritation risk
Low
Works for
MoisturizingAnti-aging

A type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles

More about Dipeptide diaminobutyroyl benzylamide diacetate
Glycine soja protein~0.25–0.5%
Key active
Irritation risk
Low
Works for
CleansingMoisturizingEvens skin toneAnti-agingAnti-oxidation

A plant extract that helps to attract water to the upper layer of the skin and soften it. It might be helpful in neutralizing free radicals. It might be somewhat helpful for evening out the skin tone. It might be able to support elastin production but solid research is lacking

More about Glycine soja protein
Superoxide dismutase~0.25–0.45%
Key active
Irritation risk
Low
Works for
Anti-oxidationMoisturizingAnti-inflammatory

An antioxidant enzyme that is naturally present in skin. It can help support skin barrier function and reduce inflammation in skin. It is used in topical medications for inflammatory skin conditions including atopic dermatitis (eczema) and psoriasis. There are three types of natural Superoxide Dismutase in human skin. The compound used in topical treatments and cosmetics are mimics of typically one of these natural variants

More about Superoxide dismutase
Caprylyl glycol~0.25–0.5%
Irritant · medium
Irritation risk
Medium
Works for
Moisturizing

Helps preserve products and creates a nice product texture

More about Caprylyl glycol
Hesperidin methyl chalcone~0.25–0.45%
Irritant · high
Irritation risk
High
Works for
Anti-oxidation

Might help neutralize free radicals in skin. Is claimed to be able to improve the appearance of undereye darkness but evidence is missing. Can be an allergen and cause irritation

More about Hesperidin methyl chalcone
Potassium sorbate~0.25–0.45%
Irritant · medium
Irritation risk
Medium

A preservative

More about Potassium sorbate
Macrocystis pyrifera extract~0.25–0.45%
Comedogenic 3/5
Irritation risk
Low
Comedogenicity
3/5
More about Macrocystis pyrifera extract
Sodium hyaluronate~0.25–0.45%
Key active
Irritation risk
Low
Works for
Moisturizing

One of the best moisturizing ingredients. Attracts water into the upper layer of the skin

More about Sodium hyaluronate
Carbomer~0.25–0.45%
Formula
Irritation risk
Low
Works for
Cleansing

Helps create a thicker or gel-like product texture. It is not a surfactant but can be used in gentle cleansing formulations

More about Carbomer
Palmitoyl tripeptide-5~0.25–0.45%
Hero · Moisturizing
Irritation risk
Low
Works for
MoisturizingAnti-aging

A type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles

More about Palmitoyl tripeptide-5
Lysine hcl~0.25–0.45%
Key active
Irritation risk
Low
Works for
Moisturizing
More about Lysine hcl
Alanine~0.25–0.45%
Key active
Irritation risk
Low
Works for
MoisturizingEvens skin tone

An amino-acid that helps to attract water to the upper layer of the skin and might help to lighten the skin, but solid evidence is lacking

More about Alanine
Chlorhexidine digluconate~0.15–0.3%
Irritant · medium
Irritation risk
Medium

A preservative

More about Chlorhexidine digluconate
Histidine hcl~0.25–0.45%
Key active
Irritation risk
Low
Works for
Moisturizing

A salt of an amino-acid that helps attract water to the upper layer of the skin. Might be helpful in restoring the skin barrier function

More about Histidine hcl
Benzyl alcohol~0.2–0.4%
Irritant · high
Irritation risk
High

A preservative. Can be used to mask unpleasant smell. Can be irritating

More about Benzyl alcohol
Serine~0.25–0.45%
Key active
Irritation risk
Low
Works for
MoisturizingAnti-aging

An amino-acid that helps to attract water to the upper layer of the skin. In combination with other amino-acids, might help to reduce fine lines and wrinkles

More about Serine
Acetic acid~0.25–0.45%
Formula
Irritation risk
Low
More about Acetic acid
Pvp~0.25–0.5%
Irritant · medium
Irritation risk
Medium

Helps evenly disperse other ingredients in a formulation and create an even layer on the surface of the skin

More about Pvp
Sodium citrate~0.25–0.45%
Irritant · medium
Irritation risk
Medium

Helps to control the skin's pH level. Maintains the skin's natural film of amino-lactic acids and oils. Helps to preserve products

More about Sodium citrate
Camellia sinensis leaf extract~0.25–0.5%
Key active
Irritation risk
Low
Works for
Anti-oxidationAntibacterialAnti-agingAnti-blemishEvens skin toneMoisturizing

Can contain potent anti-oxidant compounds (abbreviated ECG, GCG, EGC, and EGCG) that might help protect the skin from free radicals. Can help calm down inflammation and has some anti-bacterial properties. Unfortunately, these antioxidants are unstable and lose their effectiveness very quickly in products. The concentration of the antioxidant compounds in the extract also tends to be low to be effective in topical formulation

More about Camellia sinensis leaf extract
Proline~0.25–0.45%
Key active
Irritation risk
Low
Works for
Moisturizing
More about Proline
Sodium dextran sulfate~0.25–0.45%
Formula
Irritation risk
Low
More about Sodium dextran sulfate
Glutamic acid~0.25–0.45%
Key active
Irritation risk
Low
Works for
Moisturizing

An amino-acid that helps attract water to the upper layer of the skin

More about Glutamic acid
Threonine~0.25–0.45%
Key active
Irritation risk
Low
Works for
MoisturizingAnti-aging

An amino-acid that helps to attract water to the upper layer of the skin. In combination with other amino-acids, might help to reduce fine lines and wrinkles

More about Threonine
Acetyl hexapeptide-8~0.25–0.45%
Hero · Moisturizing
Irritation risk
Low
Works for
MoisturizingAnti-aging

A type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles

More about Acetyl hexapeptide-8
Hydrolyzed vegetable protein~0.25–0.45%
Key active
Irritation risk
Low
Works for
Moisturizing
More about Hydrolyzed vegetable protein
Sodium nitrate~0.25–0.4%
Formula
Irritation risk
Low
More about Sodium nitrate
Valine~0.25–0.45%
Formula
Irritation risk
Low
More about Valine
Leucine~0.25–0.45%
Formula
Irritation risk
Low
More about Leucine
Glycine~0.25–0.45%
Key active
Irritation risk
Low
Works for
Moisturizing

Helps to attract water to the upper layer of the skin and can help restore the skin barrier function

More about Glycine
Palmitoyl tetrapeptide-7~0.3–0.5%
Hero · Moisturizing
Irritation risk
Low
Works for
MoisturizingAnti-aging

A type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles

More about Palmitoyl tetrapeptide-7
Citric acid~0.25–0.45%
Irritant · medium
Irritation risk
Medium

Can work as an exfoliant but is typically used to adjust the product pH

More about Citric acid
Propanediol~0.25–0.5%
Formula
Irritation risk
Low

Acts as a solvent for other ingredients. Speeds up the absorption of other ingredients into the skin

More about Propanediol
Allantoin~0.2–0.4%
Under-dosed
Irritation risk
Low
Works for
Anti-inflammatoryMoisturizingReduces irritationReduces rednessAnti-blemishExfoliation

Helps calm down inflammation in skin and can help reduce itching. Helps to repair the skin barrier and keep skin hydrated

More about Allantoin
Isoleucine~0.2–0.4%
Key active
Irritation risk
Low
Works for
Moisturizing

An amino acid that can help attract water to the upper layer of the skin and support skin's barrier function

More about Isoleucine
N-prolyl palmitoyl tripeptide-56 acetate~0.25–0.4%
Hero · Moisturizing
Irritation risk
Low
Works for
MoisturizingAnti-aging

A type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles

More about N-prolyl palmitoyl tripeptide-56 acetate
Phenylalanine~0.25–0.4%
Formula
Irritation risk
Low
More about Phenylalanine
Acrylates/c10-30 alkyl acrylate crosspolymer~0.2–0.4%
Irritant · medium
Irritation risk
Medium

Maintains the texture of skincare products. Allows the product to spread evenly. Helps oil and water mix together

More about Acrylates/c10-30 alkyl acrylate crosspolymer
Palmitoyl tripeptide-1~0.25–0.45%
Hero · Moisturizing
Irritation risk
Low
Works for
MoisturizingAnti-aging

A type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles

More about Palmitoyl tripeptide-1
Dipeptide-2~0.2–0.35%
Hero · Moisturizing
Irritation risk
Low
Works for
MoisturizingAnti-aging

A type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles

More about Dipeptide-2
Disodium phosphate~0.2–0.35%
Formula
Irritation risk
Low

Helps adjust the product pH and stabilize the formulation

More about Disodium phosphate
Polysorbate 60~0.2–0.35%
Irritant · medium
Irritation risk
Medium
Works for
Cleansing

Helps oil and water mix together

More about Polysorbate 60
Acetyl tetrapeptide-17~0.15–0.25%
Hero · Moisturizing
Irritation risk
Low
Works for
MoisturizingAnti-aging

A type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles

More about Acetyl tetrapeptide-17
Biotin~0.15–0.3%
Formula
Irritation risk
Low
Works for
Moisturizing

Might have some moisturising properties. Is not effective when applied topically beyond some moisturizing effect

More about Biotin
Colloidal platinum~0.15–0.25%
Formula
Irritation risk
Low
More about Colloidal platinum
Sodium phosphate~0.1–0.15%
Formula
Irritation risk
Low

Helps stabilize the product formulation

More about Sodium phosphate
Ethylhexylglycerin~0.1–0.15%
Irritant · medium
Irritation risk
Medium

A preservative

More about Ethylhexylglycerin
Ingredient list view

Water, Glycerin, Acetyl octapeptide-3, Glyceryl polymethacrylate, Peg-8 dimethicone, Pentylene glycol, Peg-40 hydrogenated castor oil, Propylene glycol, Glyceryl caprylate, Triethyl citrate, Imperata cylindrica root extract, Benzoic acid, Xanthan gum, Hydrolyzed rice protein, Arginine, Sclerotium gum, Lecithin, Olea europaea leaf extract, Steareth-20, Pullulan, Taurine, Phenoxyethanol, Disodium edta, Gardenia jasminoides meristem cell culture extract, Hydroxyethylcellulose, Laminaria digitata extract, Hydrolyzed wheat protein, Silica, Sodium benzoate, Dipeptide diaminobutyroyl benzylamide diacetate, Glycine soja protein, Superoxide dismutase, Caprylyl glycol, Hesperidin methyl chalcone, Potassium sorbate, Macrocystis pyrifera extract, Sodium hyaluronate, Carbomer, Palmitoyl tripeptide-5, Lysine hcl, Alanine, Chlorhexidine digluconate, Histidine hcl, Benzyl alcohol, Serine, Acetic acid, Pvp, Sodium citrate, Camellia sinensis leaf extract, Proline, Sodium dextran sulfate, Glutamic acid, Threonine, Acetyl hexapeptide-8, Hydrolyzed vegetable protein, Sodium nitrate, Valine, Leucine, Glycine, Palmitoyl tetrapeptide-7, Citric acid, Propanediol, Allantoin, Isoleucine, N-prolyl palmitoyl tripeptide-56 acetate, Phenylalanine, Acrylates/c10-30 alkyl acrylate crosspolymer, Palmitoyl tripeptide-1, Dipeptide-2, Disodium phosphate, Polysorbate 60, Acetyl tetrapeptide-17, Biotin, Colloidal platinum, Sodium phosphate, Ethylhexylglycerin

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$206.50 Out of stock
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Worth comparing, line by line.

Match % combines shared ingredients, the first five ingredients, shared actives and hero ingredients, irritancy (lower counts in the alternative's favour), texture and body area. Only products in the same routine step are compared.

Side-by-side comparison of this product against its closest alternatives
Sarah ChapmanPlatinum Pep8 Stem Cell SerumYOUR PRODUCTSarah Chapman LondonSerum & Treatment Skinesis Platinum Pep⁸ Stem Cell SerumSanitas SkincarePeptiDerm Firming SerumDermaquestPeptide Line Corrector
Match—74%49%49%
Price$275.00—$174.00−$101.00—
Shared key ingredients—25 of 257 of 2510 of 25
Key difference——Pentapeptide-18Acetyl Hexapeptide-30
Irritancy Medium Medium Low Medium
Drying alcohol——— Contains drying alcohol
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Product summary

"Sarah Chapman - Platinum Pep8 Stem Cell Serum" is effective for: Moisturizing and Anti-oxidation

This product could be helpful for: Anti-aging, but its actives are not the most effective or are not well-studied.

Ingredient callouts

  • Peptides (acetyl tetrapeptide-17 0.15% - 0.25%, dipeptide-2 0.20% - 0.35%, palmitoyl tripeptide-1 0.25% - 0.45%, n-prolyl palmitoyl tripeptide-56 acetate 0.25% - 0.40%, palmitoyl tetrapeptide-7 0.30% - 0.50%, acetyl hexapeptide-8 0.25% - 0.45%, palmitoyl tripeptide-5 0.25% - 0.45%, dipeptide diaminobutyroyl benzylamide diacetate 0.25% - 0.45% and acetyl octapeptide-3 4.00% - 4.80%). There are many different kind of Peptides and they are naturally present in our skin. They all are a combination of aminoacids. Some of them work as natural antibiotics, promote wound-healing and production of collagen. The science is still not settled on how effective Peptides are in skincare, but it is very likely that they have a benefit. They might help restore the skin barrier and fight the signs of aging. At the very least, Peptides work as humectants: they attract water to the upper layer of the skin and improve its hydration.
  • Humectants (glycine 0.25% - 0.45%, acetyl hexapeptide-8 0.25% - 0.45%, glutamic acid 0.25% - 0.45%, alanine 0.25% - 0.45%, sodium hyaluronate 0.25% - 0.45%, imperata cylindrica root extract 0.65% - 0.95%, glycerin 4.50% - 5.50%, arginine 0.35% - 0.60% and acetyl octapeptide-3 4.00% - 4.80%). These ingredients help attract water to the upper layer of the skin and improve the skin hydration.

Price

The product retails from 255.30$ up to 275.00$ in the United States, from 185.00£ up to 255.00£ in the United Kingdom and for 323.80CA$ in Canada.

For a detailed price comparison: click here.

Sources cited in this review

Every concentration estimate and effectiveness label is anchored to one of these 33 studies and safety reviews.

  1. 1
    Glycerol and the skin: holistic approach to its origin and functionsncbi.nlm.nih.gov
  2. 2
    Amended Safety Assessment of PEGylated Oils as Used in Cosmeticscir-safety.org
  3. 3
    Surfactants and experimental irritant contact dermatitisncbi.nlm.nih.gov
  4. 4
    Propylene Glycolpubmed.ncbi.nlm.nih.gov
  5. 5
    Skin-sensitizing and irritant properties of propylene glycolonlinelibrary.wiley.com
  6. 6
    Citric Acid, Inorganic Citrate Salts and Alkyl Citrate Esters As Used in Cosmetics cir-safety.org
Sarah Chapman Platinum Pep8 Stem Cell Serum
Sarah ChapmanPlatinum Pep8 Stem Cell Serum
Buy at SpaceNK US$275.00Amazon

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Buy at SpaceNK US$275.00Amazon

As an Amazon Associate, WIMJ earns from qualifying purchases.