What's In My Jar
Ren Skincare Face Keep Young and Beautiful Firming and Smoothing Serum
Ren Skincare

Ren Skincare Face Keep Young and Beautiful Firming and Smoothing Serum

Efficacy87/100IrritancyHigh
See all ingredients

Works for

Moisturizing
Hexapeptide-11, Glycerin + 11 more
Works well
What the product description says
“Can be used under moisturiser and night cream.”
Source: Allbeauty

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: glycerin, sodium hyaluronate.

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: caprylic/capric triglyceride, helianthus annuus seed oil.

The following ingredients in this product are especially good for supporting the skin barrier and helping with the hydration level: hexapeptide-11

Hexapeptide-11HeroEffect: HighA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.4–0.95%
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~4–6.1%
PhospholipidsKey activeEffect: MediumEmollients that are naturaly present in skin. In addition, they help water and oil mix together in the product~1.7–2.5%
Rosa canina fruit oilKey active· EmollientEffect: HighA great emollient. Contains vitamin E (tocopherol) which may give it some anti-oxidant properties. Can contain volatile compounds and can be irritating~1.4–2.2%
Caprylic/capric triglycerideKey active· Emollient, OcclusiveEffect: HighA good mix of fatty acids that forms a protective layer on the skin. Improves the shelf life of products. Derived from coconut and glycerin~0.9–1.35%
Sodium hyaluronateKey active· HumectantEffect: HighOne of the best moisturizing ingredients. Attracts water into the upper layer of the skin~0.35–0.8%
Dipalmitoyl hydroxyprolineKey activeEffect: MediumIs claimed to stimulate collagen and elastin production, as well as work as an anti-oxidant. There is however not enough evidence for its effectiveness~0.35–0.85%
Magnesium aspartateKey activeEffect: MediumMight be helpful in restoring skin barrier function and calm down inflammation in skin~0.15–0.55%
Helianthus annuus seed oilKey active· Emollient, OcclusiveEffect: HighA great emollient due to its high linoleic acid content. One of the most effective plant oils in helping skin hydration and repairing skin barrier function~0.1–0.35%
Ascorbyl tetraisopalmitateEffect: Low, below effective doseA vitamin C derivative. Studies show that is might be effective in reducing hyperpigmentation, but there are no studies confirming that it is effectively converted into the bioavailable form of Vitamin C in skin. It is not clear how this derivative compares in effectiveness to the topical application of bioavailable form of vitamin C (L-ascorbic acid)~2.7–4.1%
TocopherolEffect: Low, below effective dosePure form of vitamin E. Can help moisturise and protect the skin from free radicals. Often used to help stabilise other ingredients or the formula itself~0.2–0.7%
Zinc gluconateUnder-dosedTypically used to stabilize the product formulations. It is a salt of a polyhydroxy acid (PHA) and in larger concentrations, can help shed the dead cells from the skin surface revealing smoother skin. It can help attract water to the upper layer of the skin. Might to be helpful against acne and clogged pores. Could be helpful in neutralizing free radicals, but solid research is missing. Due to the zinc content, might help calm down inflammation in skin~0.15–0.5%
Copper gluconateUnder-dosedTypically used to stabilize the product formulations. It is a salt of polyhydroxy acid (PHA) and in larger concentrations, can help shed the dead cells from the skin surface revealing smoother skin. It can help attract water to the upper layer of the skin. Might to be helpful against acne and clogged pores. Could be helpful in neutralizing free radicals, but solid research is missing~0.1–0.45%
Anti-aging
Hexapeptide-11, Dipalmitoyl hydroxyproline + 4 more
May help
What the product description says
“REN Clean Skincare, Face This serum is designed to lift and firm the skin, leaving skin feeling toned with improved elasticity.”
Source: Allbeauty

This product contains hexapeptide-11. There is some human evidence that this ingredient helps reduce and prevent fine lines and wrinkles and improve skin elasticity and firmness, though it is smaller or less consistent than the evidence for the best anti-aging ingredients.

Hexapeptide-11Key activeEffect: MediumA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.4–0.95%
Dipalmitoyl hydroxyprolineEffect: LowIs claimed to stimulate collagen and elastin production, as well as work as an anti-oxidant. There is however not enough evidence for its effectiveness~0.35–0.85%
TocopherolEffect: Low, below effective dosePure form of vitamin E. Can help moisturise and protect the skin from free radicals. Often used to help stabilise other ingredients or the formula itself~0.2–0.7%
Zinc gluconateEffect: Low, below effective doseTypically used to stabilize the product formulations. It is a salt of a polyhydroxy acid (PHA) and in larger concentrations, can help shed the dead cells from the skin surface revealing smoother skin. It can help attract water to the upper layer of the skin. Might to be helpful against acne and clogged pores. Could be helpful in neutralizing free radicals, but solid research is missing. Due to the zinc content, might help calm down inflammation in skin~0.15–0.5%
Copper gluconateEffect: Low, below effective doseTypically used to stabilize the product formulations. It is a salt of polyhydroxy acid (PHA) and in larger concentrations, can help shed the dead cells from the skin surface revealing smoother skin. It can help attract water to the upper layer of the skin. Might to be helpful against acne and clogged pores. Could be helpful in neutralizing free radicals, but solid research is missing~0.1–0.45%
Ascorbyl tetraisopalmitateUnder-dosedA vitamin C derivative. Studies show that is might be effective in reducing hyperpigmentation, but there are no studies confirming that it is effectively converted into the bioavailable form of Vitamin C in skin. It is not clear how this derivative compares in effectiveness to the topical application of bioavailable form of vitamin C (L-ascorbic acid)~2.7–4.1%

Can it cause trouble?

Irritancy
8 strong irritants: Alcohol, Parfum + 6 more — patch-test recommended
High risk
We flagged 14 ingredients with irritancy potential. Severity depends on your sensitivity threshold; the table lists the worst offenders first.
IngredientFunctionIrritationEst. amount
AlcoholCan be drying and contribute to skin irritation. Used in formulars to dissolve other ingredients, create a thinner product consistency or for its antibacterial propertiesHigh~1.3–1.9%est.
Panax ginseng root extractA plant extract that might have some anti-inflammatory properties, but solid evidence is lacking. It can be irritatingHigh~0.3–0.75%est.
ParfumAn aromatic blend of unspecified and possibly irritating ingredientsHigh~0.2–0.7%est.
Commiphora mukul resin extractA plant extract might be helpful in neutralizing free radicals and reducing inflammation in skinHigh~0.15–0.55%est.
Sodium hydroxymethylglycinateA preservative. Can be irritatingHigh~0.1–0.3%est.
Rosa damascena extractOil of a very fragrant pink rose used as fragrance in cosmetics. Extensive research has shown it has mixed benefits. In the pro column, inhaling this flower’s scent seems to have relaxing properties and the plant’s petals contain skin-soothing and antioxidant compounds that can benefit skin. On the flipside, the numerous chemicals that create this rose’s distinctive fragrance pose a risk of causing skin aggravation.High~0.1–0.35%est.
Rosmarinus officinalis leaf extractCan be helpful in reducing inflammation in skin, including inflamed acne. It can be irritatingHigh~0.05–0.2%est.
LimoneneA common frangrance that can easily irritate skin, especially if exposed to air, light or heatHigh~0.05–0.15%est.
LinaloolA fragrance. Can be irritatingHigh~0.05–0.15%est.
Ascorbyl tetraisopalmitateA vitamin C derivative. Studies show that is might be effective in reducing hyperpigmentation, but there are no studies confirming that it is effectively converted into the bioavailable form of Vitamin C in skin. It is not clear how this derivative compares in effectiveness to the topical application of bioavailable form of vitamin C (L-ascorbic acid)Medium~2.7–4.1%est.
Rosa canina fruit oilA great emollient. Contains vitamin E (tocopherol) which may give it some anti-oxidant properties. Can contain volatile compounds and can be irritatingMedium~1.4–2.2%est.
Caprylic/capric triglycerideA good mix of fatty acids that forms a protective layer on the skin. Improves the shelf life of products. Derived from coconut and glycerinMedium~0.9–1.35%est.
Zinc gluconateTypically used to stabilize the product formulations. It is a salt of a polyhydroxy acid (PHA) and in larger concentrations, can help shed the dead cells from the skin surface revealing smoother skin. It can help attract water to the upper layer of the skin. Might to be helpful against acne and clogged pores. Could be helpful in neutralizing free radicals, but solid research is missing. Due to the zinc content, might help calm down inflammation in skinMedium~0.15–0.5%est.
Copper gluconateTypically used to stabilize the product formulations. It is a salt of polyhydroxy acid (PHA) and in larger concentrations, can help shed the dead cells from the skin surface revealing smoother skin. It can help attract water to the upper layer of the skin. Might to be helpful against acne and clogged pores. Could be helpful in neutralizing free radicals, but solid research is missingMedium~0.1–0.45%est.
Comedogenic
Clean of flagged comedogenic ingredients
None flagged

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Ingredients

Filter by role to see what each ingredient is doing.

Water~40–60%
Formula
Irritation risk
Low

Plain old water

More about Water
Glycerin~4–6.1%
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
Cetearyl olivate~3.1–4.6%
Formula
Irritation risk
Low
Works for
Cleansing

Helps oil and water mix together

More about Cetearyl olivate
Ascorbyl tetraisopalmitate~2.7–4.1%
Under-dosedIrritant · medium
Irritation risk
Medium
Works for
Anti-oxidationAnti-agingEvens skin toneMoisturizing

A vitamin C derivative. Studies show that is might be effective in reducing hyperpigmentation, but there are no studies confirming that it is effectively converted into the bioavailable form of Vitamin C in skin. It is not clear how this derivative compares in effectiveness to the topical application of bioavailable form of vitamin C (L-ascorbic acid)

More about Ascorbyl tetraisopalmitate
Palmitoyl hydrolyzed wheat protein~2.1–3.2%
Formula
Irritation risk
Low
Works for
Cleansing
More about Palmitoyl hydrolyzed wheat protein
Phospholipids~1.7–2.5%
Key active
Irritation risk
Low
Works for
Moisturizing

Emollients that are naturaly present in skin. In addition, they help water and oil mix together in the product

More about Phospholipids
Rosa canina fruit oil~1.4–2.2%
Key activeIrritant · medium
Irritation risk
Medium
Works for
MoisturizingAnti-oxidation

A great emollient. Contains vitamin E (tocopherol) which may give it some anti-oxidant properties. Can contain volatile compounds and can be irritating

More about Rosa canina fruit oil
Alcohol~1.3–1.9%
Irritant · high
Irritation risk
High
Works for
Antibacterial

Can be drying and contribute to skin irritation. Used in formulars to dissolve other ingredients, create a thinner product consistency or for its antibacterial properties

More about Alcohol
Vaccinium vitis-idaea seed oil~1–1.5%
Formula
Irritation risk
Low
More about Vaccinium vitis-idaea seed oil
Caprylic/capric triglyceride~0.9–1.35%
Key activeIrritant · medium
Irritation risk
Medium
Works for
Moisturizing

A good mix of fatty acids that forms a protective layer on the skin. Improves the shelf life of products. Derived from coconut and glycerin

More about Caprylic/capric triglyceride
Sorbitan olivate~0.5–1.15%
Formula
Irritation risk
Low
Works for
Cleansing

Helps oil and water mix together

More about Sorbitan olivate
Hexapeptide-11~0.4–0.95%
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 Hexapeptide-11
Dipalmitoyl hydroxyproline~0.35–0.85%
Key active
Irritation risk
Low
Works for
MoisturizingAnti-oxidationAnti-aging

Is claimed to stimulate collagen and elastin production, as well as work as an anti-oxidant. There is however not enough evidence for its effectiveness

More about Dipalmitoyl hydroxyproline
Sodium hyaluronate~0.35–0.8%
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
Oryzanol~0.3–0.7%
Formula
Irritation risk
Low
Works for
Anti-oxidation

An anti-oxidant that helps stabilize product formulations. Might help neutralise free radicals in skin

More about Oryzanol
Panax ginseng root extract~0.3–0.75%
Irritant · high
Irritation risk
High
Works for
Anti-inflammatoryAnti-oxidation

A plant extract that might have some anti-inflammatory properties, but solid evidence is lacking. It can be irritating

More about Panax ginseng root extract
Parfum~0.2–0.7%
Irritant · high
Irritation risk
High

An aromatic blend of unspecified and possibly irritating ingredients

More about Parfum
Tocopherol~0.2–0.7%
Formula
Irritation risk
Low
Works for
Anti-oxidationMoisturizingAnti-agingAnti-inflammatory

Pure form of vitamin E. Can help moisturise and protect the skin from free radicals. Often used to help stabilise other ingredients or the formula itself

More about Tocopherol
Xanthan gum~0.15–0.65%
Formula
Irritation risk
Low
Works for
Cleansing

Used to create a thicker product consistency

More about Xanthan gum
Commiphora mukul resin extract~0.15–0.55%
Irritant · high
Irritation risk
High
Works for
Anti-oxidationAnti-inflammatory

A plant extract might be helpful in neutralizing free radicals and reducing inflammation in skin

More about Commiphora mukul resin extract
Magnesium aspartate~0.15–0.55%
Key active
Irritation risk
Low
Works for
Anti-inflammatoryMoisturizing

Might be helpful in restoring skin barrier function and calm down inflammation in skin

More about Magnesium aspartate
Zinc gluconate~0.15–0.5%
Under-dosedIrritant · medium
Irritation risk
Medium
Works for
MoisturizingAnti-blemishExfoliationAnti-agingEvens skin toneAnti-oxidationAnti-inflammatory

Typically used to stabilize the product formulations. It is a salt of a polyhydroxy acid (PHA) and in larger concentrations, can help shed the dead cells from the skin surface revealing smoother skin. It can help attract water to the upper layer of the skin. Might to be helpful against acne and clogged pores. Could be helpful in neutralizing free radicals, but solid research is missing. Due to the zinc content, might help calm down inflammation in skin

More about Zinc gluconate
Phenoxyethanol~0.1–0.5%
Formula
Irritation risk
Low

A preservative. It helps prevent bacterial growth in cosmetic products

More about Phenoxyethanol
Gynostemma pentaphyllum leaf extract~0.1–0.45%
Formula
Irritation risk
Low
More about Gynostemma pentaphyllum leaf extract
Copper gluconate~0.1–0.45%
Under-dosedIrritant · medium
Irritation risk
Medium
Works for
MoisturizingEvens skin toneAnti-blemishExfoliationAnti-oxidationAnti-aging

Typically used to stabilize the product formulations. It is a salt of polyhydroxy acid (PHA) and in larger concentrations, can help shed the dead cells from the skin surface revealing smoother skin. It can help attract water to the upper layer of the skin. Might to be helpful against acne and clogged pores. Could be helpful in neutralizing free radicals, but solid research is missing

More about Copper gluconate
Sodium hydroxymethylglycinate~0.1–0.3%
Irritant · high
Irritation risk
High

A preservative. Can be irritating

More about Sodium hydroxymethylglycinate
Rosa damascena extract~0.1–0.35%
Irritant · high
Irritation risk
High

Oil of a very fragrant pink rose used as fragrance in cosmetics. Extensive research has shown it has mixed benefits. In the pro column, inhaling this flower’s scent seems to have relaxing properties and the plant’s petals contain skin-soothing and antioxidant compounds that can benefit skin. On the flipside, the numerous chemicals that create this rose’s distinctive fragrance pose a risk of causing skin aggravation.

More about Rosa damascena extract
Helianthus annuus seed oil~0.1–0.35%
Key active
Irritation risk
Low
Works for
Moisturizing

A great emollient due to its high linoleic acid content. One of the most effective plant oils in helping skin hydration and repairing skin barrier function

More about Helianthus annuus seed oil
Rosmarinus officinalis leaf extract~0.05–0.2%
Irritant · high
Irritation risk
High
Works for
Anti-blemishAnti-oxidationAntibacterial

Can be helpful in reducing inflammation in skin, including inflamed acne. It can be irritating

More about Rosmarinus officinalis leaf extract
Limonene~0.05–0.15%
Irritant · high
Irritation risk
High

A common frangrance that can easily irritate skin, especially if exposed to air, light or heat

More about Limonene
Linalool~0.05–0.15%
Irritant · high
Irritation risk
High

A fragrance. Can be irritating

More about Linalool
Ingredient list view

Water, Glycerin, Cetearyl olivate, Ascorbyl tetraisopalmitate, Palmitoyl hydrolyzed wheat protein, Phospholipids, Rosa canina fruit oil, Alcohol, Vaccinium vitis-idaea seed oil, Caprylic/capric triglyceride, Sorbitan olivate, Hexapeptide-11, Dipalmitoyl hydroxyproline, Sodium hyaluronate, Oryzanol, Panax ginseng root extract, Parfum, Tocopherol, Xanthan gum, Commiphora mukul resin extract, Magnesium aspartate, Zinc gluconate, Phenoxyethanol, Gynostemma pentaphyllum leaf extract, Copper gluconate, Sodium hydroxymethylglycinate, Rosa damascena extract, Helianthus annuus seed oil, Rosmarinus officinalis leaf extract, Limonene, Linalool

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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
Ren SkincareFace Keep Young and Beautiful Firming and Smoothing SerumYOUR PRODUCTJin Jung sungOmega Vegan Vita SerumKORRESFace Care Black Pine Sculpt + Lift SerumALASTIN SkincareHA IMMERSE Serum
Match—49%49%49%
Price—$31.40$40.04$134.00
Shared key ingredients—5 of 104 of 106 of 10
Key difference—NiacinamideLactic AcidAnhydroxylitol
Irritancy High Medium Medium Medium
Drying alcohol Contains drying alcohol ———
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Product summary

"Ren Skincare - Face Keep Young and Beautiful Firming and Smoothing Serum" is effective for: Moisturizing

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

Ingredient callouts

  • Peptides (hexapeptide-11 0.40% - 0.95%). Peptides are a very big group of ingredients. They all consist of a different combination of aminoacids. Our skin produces Peptides naturally. Some of them work as natural antibiotics, promote wound-healing and production of collagen. The scientists are still studying how effective the topical application of Peptides is, but it is very likely that theynare helpful. Peptides might be able to support skin barrier restoration and even have an anti-aging benefit. At the very least, they certainly help attract water to the skin and support the hydration in this way.
  • Humectants (sodium hyaluronate 0.35% - 0.80% and glycerin 4.00% - 6.10%). These ingredients help attract water to the upper layer of the skin and improve the skin hydration.

Sources cited in this review

Every concentration estimate and effectiveness label is anchored to one of these 28 studies and safety reviews.

  1. 1
    Glycerol and the skin: holistic approach to its origin and functionsncbi.nlm.nih.gov
  2. 2
    Assessment of penetration of Ascorbyl Tetraisopalmitate into biological membranes by molecular dynamicssciencedirect.com
  3. 3
    Stability evaluation of tocopheryl acetate and ascorbyl tetraisopalmitate in isolation and incorporated in cosmetic formulations using thermal analysisscielo.br
  4. 4
    A new lipophilic pro-vitamin C, tetra-isopalmitoyl ascorbic acid (VC-IP), prevents UV-induced skin pigmentation through its anti-oxidative propertiessciencedirect.com
  5. 5
    New lipophilic pro-vitamin C, tetra-isopalmitoyl ascorbic acid (VC-IP), suppresses senile lentigo through controlling of melanocytes-keratinocytes interactionmorressier.com
  6. 6
    Hyaluronic acid: A key molecule in skin agingncbi.nlm.nih.gov
Ren Skincare Face Keep Young and Beautiful Firming and Smoothing Serum
Ren SkincareFace Keep Young and Beautiful Firming and Smoothing Serum
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