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Eighth Day 2.0 The Reparative Moisturizer
Eighth Day 2.0

Eighth Day 2.0 The Reparative Moisturizer

Efficacy87/100IrritancyHigh
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Works for

2 of 2 advertised claims delivered

Moisturizing
Sh-polypeptide-11, Sh-polypeptide-9 + 32 more
Strong evidence
What the product description says
“The Reparative Moisturizer”
Source: Eighth Day

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, butyrospermum parkii butter.

The following ingredients in this product are especially good for supporting the skin barrier and helping with the hydration level: acetyl hexapeptide-8, palmitoyl tetrapeptide-7, palmitoyl tripeptide-5, sh-oligopeptide-1, sh-oligopeptide-2, sh-polypeptide-1, sh-polypeptide-11, sh-polypeptide-9

Glutamic acidKey active· HumectantEffect: HighAn amino-acid that helps attract water to the upper layer of the skin~0.25–0.5%
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~0.55–0.85%
Sh-polypeptide-11HeroEffect: HighA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.45–0.65%
Sh-polypeptide-9HeroEffect: HighA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.45–0.65%
Sodium hyaluronateKey active· HumectantEffect: HighOne of the best moisturizing ingredients. Attracts water into the upper layer of the skin~0.25–0.5%
Sodium pcaKey active· HumectantEffect: HighNaturally present in skin and helps to attract water to its upper layer~0.25–0.5%
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~0.25–0.5%
Acetyl hexapeptide-8Hero· HumectantEffect: HighA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.4–0.6%
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~0.25–0.5%
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~0.25–0.45%
Butyrospermum parkii butterKey active· Emollient, OcclusiveEffect: HighA great moisturising ingredient that softens the skin and reduces water loss from its upper layer. It also can be helpful in protecting skin from free radicals~4.3–5.3%
Cocos nucifera oilKey active· Emollient, OcclusiveEffect: HighAn emollient. Found to be as effective as a moisturizer for dry skin as mineral oil. Could be comedogenic~3.3–4%
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%
GlycosphingolipidsKey active· EmollientEffect: HighA type of lipids naturally present in skin. They can be converted to ceramides in skin~0.3–0.55%
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~0.25–0.5%
Hydrolyzed hyaluronic acidKey active· HumectantEffect: HighOne of the best moisturizing ingredients. Attracts water into the upper layer of the skin. A version of it is naturally present in skin~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~0.25–0.5%
Lysine hclKey activeEffect: High~0.25–0.5%
Palmitoyl tetrapeptide-7Hero· EmollientEffect: HighA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.35–0.65%
Palmitoyl tripeptide-5HeroEffect: HighA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.3–0.6%
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%
Sh-oligopeptide-1HeroEffect: HighA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.35–0.6%
Sh-oligopeptide-2HeroEffect: HighA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.45–0.7%
Sh-polypeptide-1HeroEffect: HighA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.45–0.65%
ProlineKey activeEffect: Medium~0.3–0.5%
Ethylhexyl palmitateKey active· EmollientEffect: MediumAn emollient that helps soften the skin and create a nice product texture~4.9–6%
Butylene glycol· HumectantEffect: LowUsed to create a nice product texture and help delivery of other ingredients. Might be somewhat helpful in attracting water to the upper layer of the skin~0.2–0.35%
Caprylyl glycol· Humectant, EmollientEffect: LowHelps preserve products and creates a nice product texture~0.65–0.95%
Linum usitatissimum seed oilEffect: Low~0.25–0.45%
Glyceryl stearate· EmollientEffect: LowAn emollient that softens the skin and forms a protective layer on its surface. Helps water and oil mix together~1.2–1.5%
AllantoinUnder-dosedEffect: HighHelps calm down inflammation in skin and can help reduce itching. Helps to repair the skin barrier and keep skin hydrated~0.2–0.35%
LecithinEffect: Low, below effective doseUsed mostly for creating emulsions - helping oil and water mix together. Helps soften the upper layer of the skin~0.3–0.5%
Aloe barbadensis leaf juiceEffect: Low, below effective doseTraditionally used to treat sunburns, dermatitis and inflammation, but evidence for its effectiveness is lacking. The extract can contain humectants that help attract water into the skin~0.95–1.15%
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~0.25–0.5%
Evens skin tone
Ferulic acid, Alanine + 3 more
Moderate evidence
What the product description says
“Antioxidant-rich ferulic acid visibly brightens, evens tone and reduces inflammation.”
Source: Eighth Day

The following ingredient (ingredients) in this product might be helpful, but there is no evidence to confirm that it actually works: alanine, ferulic acid, resveratrol.

Ferulic acidKey activeEffect: MediumA potent anti-oxidant that has been shown to be effective in neutralizing free radicals in skin. There seem to have a synergetic effect of ferulic acid, vitamin E and C, meaning that when the ingredients are used together, they enhance each other's ability protect the skin against free radicals. Ferulic acid also helps to stabilize other ingredients - including vitamins C and E. It can help to even out the skin tone. Ferulic acid is approved for use as a sunscreen ingredient in Japan in concentrations up to 10%~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~0.25–0.5%
ResveratrolEffect: LowHelps neutralize free radicals in skin and might help reduce fine lines and wrinkles, as well as even out the skin tone~0.3–0.5%
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~0.25–0.5%
Retinyl palmitateUnder-dosedEffect: MediumThree steps removed from the active form of vitamin A - retinoic acid. To have an effect in the skin, it first needs to be converted twice to become the retinoic acid. This means it is less potent than retinol, but could also be less irritating. Once converted to the retinoic acid in the skin, it helps against all signs of aging, improves skin cell turnover and helps fight blemishes and clogged pores. However, in many cosmetic formulations, it is used in a concentration that is too low to have the full effect~0.25–0.45%
Anti-oxidation
Not advertised by the brand · Resveratrol, Ferulic acid + 5 more
Strong evidence

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

ResveratrolKey activeEffect: HighHelps neutralize free radicals in skin and might help reduce fine lines and wrinkles, as well as even out the skin tone~0.3–0.5%
Ferulic acidKey activeEffect: HighA potent anti-oxidant that has been shown to be effective in neutralizing free radicals in skin. There seem to have a synergetic effect of ferulic acid, vitamin E and C, meaning that when the ingredients are used together, they enhance each other's ability protect the skin against free radicals. Ferulic acid also helps to stabilize other ingredients - including vitamins C and E. It can help to even out the skin tone. Ferulic acid is approved for use as a sunscreen ingredient in Japan in concentrations up to 10%~0.25–0.5%
Butyrospermum parkii butterEffect: LowA great moisturising ingredient that softens the skin and reduces water loss from its upper layer. It also can be helpful in protecting skin from free radicals~4.3–5.3%
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~0.25–0.5%
TocopherolUnder-dosedEffect: HighPure 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~0.25–0.5%
ErgothioneineUnder-dosedEffect: HighCan help neutralize free radicals in skin. Preliminary studies show that it can be more effective than coenzyme Q10 but studies on effective concentration for topical applications are lacking~0.25–0.5%
Rosmarinus officinalis leaf extractEffect: Low, below effective doseCan be helpful in reducing inflammation in skin, including inflamed acne. It can be irritating~0.15–0.3%
Anti-aging
Not advertised by the brand · Sh-oligopeptide-1, Sh-oligopeptide-2 + 14 more
Moderate evidence

This product contains acetyl hexapeptide-8, ferulic acid, palmitoyl tetrapeptide-7, palmitoyl tripeptide-5, resveratrol, serine, sh-oligopeptide-1, sh-oligopeptide-2, sh-polypeptide-1, sh-polypeptide-11, sh-polypeptide-9, 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.

Sh-oligopeptide-1Key activeEffect: MediumA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.35–0.6%
Sh-oligopeptide-2Key activeEffect: MediumA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.45–0.7%
Sh-polypeptide-1Key activeEffect: MediumA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.45–0.65%
Sh-polypeptide-11Key activeEffect: MediumA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.45–0.65%
Sh-polypeptide-9Key activeEffect: MediumA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.45–0.65%
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~0.25–0.5%
Palmitoyl tripeptide-5Key activeEffect: MediumA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.3–0.6%
ResveratrolKey activeEffect: MediumHelps neutralize free radicals in skin and might help reduce fine lines and wrinkles, as well as even out the skin tone~0.3–0.5%
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%
Acetyl hexapeptide-8Key activeEffect: MediumA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.4–0.6%
Ferulic acidKey activeEffect: MediumA potent anti-oxidant that has been shown to be effective in neutralizing free radicals in skin. There seem to have a synergetic effect of ferulic acid, vitamin E and C, meaning that when the ingredients are used together, they enhance each other's ability protect the skin against free radicals. Ferulic acid also helps to stabilize other ingredients - including vitamins C and E. It can help to even out the skin tone. Ferulic acid is approved for use as a sunscreen ingredient in Japan in concentrations up to 10%~0.25–0.5%
Palmitoyl tetrapeptide-7Key activeEffect: MediumA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.35–0.65%
Butyrospermum parkii butterEffect: LowA great moisturising ingredient that softens the skin and reduces water loss from its upper layer. It also can be helpful in protecting skin from free radicals~4.3–5.3%
Retinyl palmitateUnder-dosedEffect: MediumThree steps removed from the active form of vitamin A - retinoic acid. To have an effect in the skin, it first needs to be converted twice to become the retinoic acid. This means it is less potent than retinol, but could also be less irritating. Once converted to the retinoic acid in the skin, it helps against all signs of aging, improves skin cell turnover and helps fight blemishes and clogged pores. However, in many cosmetic formulations, it is used in a concentration that is too low to have the full effect~0.25–0.45%
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~0.25–0.5%
Aloe barbadensis leaf juiceEffect: Low, below effective doseTraditionally used to treat sunburns, dermatitis and inflammation, but evidence for its effectiveness is lacking. The extract can contain humectants that help attract water into the skin~0.95–1.15%

Can it cause trouble?

Irritancy
6 strong irritants: Retinyl palmitate, Rosmarinus officinalis leaf extract + 4 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
Retinyl palmitateThree steps removed from the active form of vitamin A - retinoic acid. To have an effect in the skin, it first needs to be converted twice to become the retinoic acid. This means it is less potent than retinol, but could also be less irritating. Once converted to the retinoic acid in the skin, it helps against all signs of aging, improves skin cell turnover and helps fight blemishes and clogged pores. However, in many cosmetic formulations, it is used in a concentration that is too low to have the full effectHigh~0.25–0.45%est.
Rosmarinus officinalis leaf extractCan be helpful in reducing inflammation in skin, including inflamed acne. It can be irritatingHigh~0.15–0.3%est.
Lavandula angustifolia oilAn essential oil. Potential allergen and can be irritating. It has some anti-bacterial propertiesHigh~0.15–0.3%est.
GeraniolA fragrance. Can be irritatingHigh~0.15–0.3%est.
LimoneneA common frangrance that can easily irritate skin, especially if exposed to air, light or heatHigh~0.15–0.25%est.
LinaloolA fragrance. Can be irritatingHigh~0.1–0.2%est.
Sorbitan oleateHelps oil and water mix togetherMedium~2–2.4%est.
Aloe barbadensis leaf juiceTraditionally used to treat sunburns, dermatitis and inflammation, but evidence for its effectiveness is lacking. The extract can contain humectants that help attract water into the skinMedium~0.95–1.15%est.
Caprylhydroxamic acidA preservativeMedium~0.65–1%est.
Caprylyl glycolHelps preserve products and creates a nice product textureMedium~0.65–0.95%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~0.25–0.5%est.
ResveratrolHelps neutralize free radicals in skin and might help reduce fine lines and wrinkles, as well as even out the skin toneMedium~0.3–0.5%est.
1,2-hexanediolA preservativeMedium~0.25–0.45%est.
EthylhexylglycerinA preservativeMedium~0.25–0.45%est.
Comedogenic
4 ingredients rated 2 or more on the 0–5 pore-clogging scale
4 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
Ethylhexyl palmitateAn emollient that helps soften the skin and create a nice product texture3/5~4.9–6%est.
Butyrospermum parkii butterA great moisturising ingredient that softens the skin and reduces water loss from its upper layer. It also can be helpful in protecting skin from free radicals3/5~4.3–5.3%est.
Cocos nucifera oilAn emollient. Found to be as effective as a moisturizer for dry skin as mineral oil. Could be comedogenic3/5~3.3–4%est.
Sorbitan oleateHelps oil and water mix together2/5~2–2.4%est.
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The Ultra-Rich Intensive Moisturizer
EighthDay The Ultra-Rich Intensive Moisturizer
Closest match61% match
$290.00
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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
Ethylhexyl palmitate~4.9–6%
Key activeComedogenic 3/5
Irritation risk
Low
Comedogenicity
3/5
Works for
Moisturizing

An emollient that helps soften the skin and create a nice product texture

More about Ethylhexyl palmitate
Butyrospermum parkii butter~4.3–5.3%
Key activeComedogenic 3/5
Irritation risk
Low
Comedogenicity
3/5
Works for
MoisturizingAnti-oxidationAnti-aging

A great moisturising ingredient that softens the skin and reduces water loss from its upper layer. It also can be helpful in protecting skin from free radicals

More about Butyrospermum parkii butter
Cocos nucifera oil~3.3–4%
Key activeComedogenic 3/5
Irritation risk
Low
Comedogenicity
3/5
Works for
Moisturizing

An emollient. Found to be as effective as a moisturizer for dry skin as mineral oil. Could be comedogenic

More about Cocos nucifera oil
Cetearyl olivate~2.4–2.9%
Formula
Irritation risk
Low
Works for
Cleansing

Helps oil and water mix together

More about Cetearyl olivate
Sorbitan oleate~2–2.4%
Comedogenic 2/5Irritant · medium
Irritation risk
Medium
Comedogenicity
2/5
Works for
Cleansing

Helps oil and water mix together

More about Sorbitan oleate
Stearyl alcohol~1.8–2.1%
Formula
Irritation risk
Low
Works for
Cleansing

An emollient that helps soften the skin

More about Stearyl alcohol
Propanediol~1.4–1.8%
Formula
Irritation risk
Low

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

More about Propanediol
Glyceryl stearate~1.2–1.5%
Formula
Irritation risk
Low
Works for
CleansingMoisturizing

An emollient that softens the skin and forms a protective layer on its surface. Helps water and oil mix together

More about Glyceryl stearate
Aloe barbadensis leaf juice~0.95–1.15%
Irritant · medium
Irritation risk
Medium
Works for
MoisturizingAntibacterialReduces irritationReduces rednessAnti-inflammatoryAnti-blemishAnti-aging

Traditionally used to treat sunburns, dermatitis and inflammation, but evidence for its effectiveness is lacking. The extract can contain humectants that help attract water into the skin

More about Aloe barbadensis leaf juice
Caprylhydroxamic acid~0.65–1%
Irritant · medium
Irritation risk
Medium

A preservative

More about Caprylhydroxamic acid
Caprylyl glycol~0.65–0.95%
Irritant · medium
Irritation risk
Medium
Works for
Moisturizing

Helps preserve products and creates a nice product texture

More about Caprylyl glycol
Glycerin~0.55–0.85%
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
Sh-oligopeptide-2~0.45–0.7%
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 Sh-oligopeptide-2
Sh-polypeptide-1~0.45–0.65%
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 Sh-polypeptide-1
Sh-polypeptide-9~0.45–0.65%
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 Sh-polypeptide-9
Sh-polypeptide-11~0.45–0.65%
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 Sh-polypeptide-11
Acetyl hexapeptide-8~0.4–0.6%
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
Sh-oligopeptide-1~0.35–0.6%
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 Sh-oligopeptide-1
Palmitoyl tripeptide-5~0.3–0.6%
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
Palmitoyl tetrapeptide-7~0.35–0.65%
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
Acetyl glutamine~0.3–0.55%
Formula
Irritation risk
Low
More about Acetyl glutamine
Sodium hyaluronate~0.25–0.5%
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
Lysine hcl~0.25–0.5%
Key active
Irritation risk
Low
Works for
Moisturizing
More about Lysine hcl
Alanine~0.25–0.5%
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
Histidine hcl~0.25–0.5%
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
Arginine~0.25–0.45%
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
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
Proline~0.3–0.5%
Key active
Irritation risk
Low
Works for
Moisturizing
More about Proline
Glutamic acid~0.25–0.5%
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~0.25–0.5%
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
Valine~0.25–0.45%
Formula
Irritation risk
Low
More about Valine
Leucine~0.25–0.5%
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
Isoleucine~0.25–0.5%
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
Phenylalanine~0.25–0.5%
Formula
Irritation risk
Low
More about Phenylalanine
Taurine~0.25–0.5%
Irritant · medium
Irritation risk
Medium
Works for
Anti-blemishAnti-oxidationAnti-inflammatoryEvens 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
Glycosphingolipids~0.3–0.55%
Key active
Irritation risk
Low
Works for
Moisturizing

A type of lipids naturally present in skin. They can be converted to ceramides in skin

More about Glycosphingolipids
Glycolipids~0.25–0.5%
Formula
Irritation risk
Low
More about Glycolipids
Hydrolyzed hyaluronic acid~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. A version of it is naturally present in skin

More about Hydrolyzed hyaluronic acid
Ferulic acid~0.25–0.5%
Key active
Irritation risk
Low
Works for
Anti-oxidationAnti-agingEvens skin toneAnti-inflammatory

A potent anti-oxidant that has been shown to be effective in neutralizing free radicals in skin. There seem to have a synergetic effect of ferulic acid, vitamin E and C, meaning that when the ingredients are used together, they enhance each other's ability protect the skin against free radicals. Ferulic acid also helps to stabilize other ingredients - including vitamins C and E. It can help to even out the skin tone. Ferulic acid is approved for use as a sunscreen ingredient in Japan in concentrations up to 10%

More about Ferulic acid
Retinyl palmitate~0.25–0.45%
Under-dosedIrritant · high
Irritation risk
High
Works for
Anti-agingEvens skin toneAnti-blemishExfoliation

Three steps removed from the active form of vitamin A - retinoic acid. To have an effect in the skin, it first needs to be converted twice to become the retinoic acid. This means it is less potent than retinol, but could also be less irritating. Once converted to the retinoic acid in the skin, it helps against all signs of aging, improves skin cell turnover and helps fight blemishes and clogged pores. However, in many cosmetic formulations, it is used in a concentration that is too low to have the full effect

More about Retinyl palmitate
Resveratrol~0.3–0.5%
Key activeIrritant · medium
Irritation risk
Medium
Works for
Anti-oxidationAnti-agingEvens skin tone

Helps neutralize free radicals in skin and might help reduce fine lines and wrinkles, as well as even out the skin tone

More about Resveratrol
Ergothioneine~0.25–0.5%
Under-dosed
Irritation risk
Low
Works for
Anti-oxidation

Can help neutralize free radicals in skin. Preliminary studies show that it can be more effective than coenzyme Q10 but studies on effective concentration for topical applications are lacking

More about Ergothioneine
Linum usitatissimum seed oil~0.25–0.45%
Formula
Irritation risk
Low
Works for
Moisturizing
More about Linum usitatissimum seed oil
Bacillus/folic acid/soybean ferment extract~0.25–0.45%
Formula
Irritation risk
Low
More about Bacillus/folic acid/soybean ferment extract
Tocopherol~0.25–0.5%
Under-dosed
Irritation risk
Low
Works for
Anti-oxidationAnti-inflammatoryAnti-agingMoisturizing

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
Sodium pca~0.25–0.5%
Key active
Irritation risk
Low
Works for
Moisturizing

Naturally present in skin and helps to attract water to its upper layer

More about Sodium pca
1,2-hexanediol~0.25–0.45%
Irritant · medium
Irritation risk
Medium

A preservative

More about 1,2-hexanediol
Polysorbate 20~0.3–0.5%
Formula
Irritation risk
Low
Works for
Cleansing

Helps oil and water mix together

More about Polysorbate 20
Ethylhexylglycerin~0.25–0.45%
Irritant · medium
Irritation risk
Medium

A preservative

More about Ethylhexylglycerin
Allantoin~0.2–0.35%
Under-dosed
Irritation risk
Low
Works for
MoisturizingAnti-inflammatoryReduces 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
Lecithin~0.3–0.5%
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
Butylene glycol~0.2–0.35%
Formula
Irritation risk
Low
Works for
Moisturizing

Used to create a nice product texture and help delivery of other ingredients. Might be somewhat helpful in attracting water to the upper layer of the skin

More about Butylene glycol
Rosmarinus officinalis leaf extract~0.15–0.3%
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
Lavandula angustifolia oil~0.15–0.3%
Irritant · high
Irritation risk
High

An essential oil. Potential allergen and can be irritating. It has some anti-bacterial properties

More about Lavandula angustifolia oil
Xanthan gum~0.15–0.3%
Formula
Irritation risk
Low
Works for
Cleansing

Used to create a thicker product consistency

More about Xanthan gum
Geraniol~0.15–0.3%
Irritant · high
Irritation risk
High

A fragrance. Can be irritating

More about Geraniol
Limonene~0.15–0.25%
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~0.1–0.2%
Irritant · high
Irritation risk
High

A fragrance. Can be irritating

More about Linalool
Linalyl acetate~0.1–0.2%
Formula
Irritation risk
Low
More about Linalyl acetate
Ingredient list view

Water, Ethylhexyl palmitate, Butyrospermum parkii butter, Cocos nucifera oil, Cetearyl olivate, Sorbitan oleate, Stearyl alcohol, Propanediol, Glyceryl stearate, Aloe barbadensis leaf juice, Caprylhydroxamic acid, Caprylyl glycol, Glycerin, Sh-oligopeptide-2, Sh-polypeptide-1, Sh-polypeptide-9, Sh-polypeptide-11, Acetyl hexapeptide-8, Sh-oligopeptide-1, Palmitoyl tripeptide-5, Palmitoyl tetrapeptide-7, Acetyl glutamine, Sodium hyaluronate, Lysine hcl, Alanine, Histidine hcl, Arginine, Serine, Proline, Glutamic acid, Threonine, Valine, Leucine, Glycine, Isoleucine, Phenylalanine, Taurine, Glycosphingolipids, Glycolipids, Hydrolyzed hyaluronic acid, Ferulic acid, Retinyl palmitate, Resveratrol, Ergothioneine, Linum usitatissimum seed oil, Bacillus/folic acid/soybean ferment extract, Tocopherol, Sodium pca, 1,2-hexanediol, Polysorbate 20, Ethylhexylglycerin, Allantoin, Lecithin, Butylene glycol, Rosmarinus officinalis leaf extract, Lavandula angustifolia oil, Xanthan gum, Geraniol, Limonene, Linalool, Linalyl acetate

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Eighth Day
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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
Eighth Day 2.0The Reparative MoisturizerYOUR PRODUCTEighthDayThe Ultra-Rich Intensive Moisturizer
Match—61%
Price$180.00$290.00+$110.00
Shared key ingredients—24 of 31
Key difference—Copper Tripeptide-1
Irritancy High Medium
Drying alcohol——
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Product summary

Based on the ingredient list, "Eighth Day 2.0 - The Reparative Moisturizer" can work well for skin moisturization. The formulation is based on a combination of good humectants and emollients. Both are needed to increase the skin hydration level. Humectants in this product (alanine, arginine, glutamic acid, glycerin and glycine) help to increase the water content in the upper layer of the skin. (These ingredients do so by "capturing" water molecules from the outside air or from within the deeper layers of the skin). Emollients in this formulation (palmitoyl tetrapeptide-7, glycosphingolipids, arginine, butyrospermum parkii butter and cocos nucifera oil) help to reduce the moisture loss from the skin. They also soften the skin surface and relieve the feeling of dryness and tightness.

Ingredient callouts

  • this moisturizer includes a form of Retinoids (vitamin A) - retinyl palmitate 0.25% - 0.45%, but this type of vitamin A is not very effective. It could in theory help with fine lines and wrinkles, but the effect is most likely minimal.
  • We like that this moisturizer contains peptides (palmitoyl tetrapeptide-7 0.45% - 0.65%, palmitoyl tripeptide-5 0.40% - 0.60%, sh-polypeptide-9 0.45% - 0.65%, sh-polypeptide-1 0.45% - 0.70% and sh-oligopeptide-2 0.50% - 0.75%). 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. Peptides 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.
This product contains ingredients that could be beneficial, but their concentrations are too low in this formulation: lecithin, allantoin, vitamin e and ergothioneine

Irritation risk

This formulation includes some common irritants, including ingredients that do not provide a benefit for the skin. We assess the overall irritancy of this moisturizer to be high. For a detailed overview of all potential irritants: click here

You can see the detailed formula review with the breakdown of all actives in the product and the full ingredient list with estimated concentrations in the tables below.

Sources cited in this review

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

  1. 1
    Surfactants and experimental irritant contact dermatitisncbi.nlm.nih.gov
  2. 2
    Glycerol and the skin: holistic approach to its origin and functionsncbi.nlm.nih.gov
  3. 3
    Hyaluronic acid: A key molecule in skin agingncbi.nlm.nih.gov
  4. 4
    Hyaluronan (Hyaluronic Acid): a natural moisturizer for skin careresearchgate.net
  5. 5
    Combination of amino acids reduces pigmentation in B16F0 melanoma cellsncbi.nlm.nih.gov
  6. 6
    Safety Assessment of α-Amino Acids as Used in Cosmeticsciteseerx.ist.psu.edu
Eighth Day 2.0 The Reparative Moisturizer
Eighth Day 2.0The Reparative Moisturizer
Buy at Eighth Day$180.00Amazon

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Buy at Eighth Day$180.00Amazon

As an Amazon Associate, WIMJ earns from qualifying purchases.