Erno Laszlo AHA Resurfacing Sleep Serum

Erno Laszlo AHA Resurfacing Sleep Serum

Efficacy100/100IrritancyLow

Works for

Exfoliation
Glycolic acid, Lactic acid + 3 more
Works well
What the product description says
“AHA Resurfacing Sleep Serum”
Source: Lookfantastic

This product can help exfoliate the skin. In other words, it helps break down the bonds between dead cells on the surface of the skin and speed up the skin turnover. Skin often appears softer and brighter after exfoliation, but overdoing it can result in disrupted skin barrier. The following ingredient is doing the exfoliating job in this product: glycolic acid, lactic acid, salicylic acid.

Glycolic acidKey activeEffect: HighAn alpha-hydroxy acid (AHA) that helps to remove the dead skin cells on the surface of the skin reveling a more even, smoother complexation. It is also able to stimulate collagen production with long-term use. Could help to reduce pore congestion. It can be irritating to the skin. Apply sunscreen daily if using products with glycolic acid~5.2–7.7%
Lactic acidKey activeEffect: HighAn exfoliating and moisturizing alpha-hydroxy acid (AHA). Typically causes less irritation than other AHAs, for example, glycolic acid. At high concentrations (about 15%), lactic acid can help reduce lines and wrinkles. Recent studies show that lactic acid can support the "good" bacteria living on skin's surface (healthy skin microbiome)~3.5–5.3%
Salicylic acidKey activeEffect: HighUsed for skin exfoliation. It has an anti-inflammatory and anti-bacterial effect, helps to unclog pores, prevent blemishes and speed up healing of the existing ones. Sometimes referred to as a BHA (beta-hydroxy acid)~0.1–0.5%
Salix alba bark extractEffect: LowA plant extract that can help neutralize free radicals in skin. It contains a compound salicin that can theoretically be converted into salicylic acid that, in turn, helps reduce inflammation in skin, but the evidence of effectiveness in skin is lacking and the extract is usually not used in a concentration that would enable an exfoliating effect~0.1–0.45%
Maris salEffect: Low, below effective doseUsed to thicken the product formulation and might help to add minerals to the surface of the skin. It is used in scrubs as a physical exfoliant. Can increase sensitivity to other ingredients if left on the skin or used in high concentration~0.1–0.35%
Evens skin tone
Glycolic acid, Lactic acid + 1 more
Works well
What the product description says
“The looks of fine lines and wrinkles are visibly reduced, with discolouration balanced and renewed.”
Source: Lookfantastic

This product can help reduce hypepigmentation and even out the skin tone because it contains the following effective ingredients: glycolic acid, lactic acid, salicylic acid

Keep in mind that you would need to apply any topical skincare targetted at hypigmentation consistently for a couple of months to get a result. No topical skincare product can help get rid of hyperpigmentation (including post-acne marks and age spots) instantly.

Glycolic acidKey activeEffect: HighAn alpha-hydroxy acid (AHA) that helps to remove the dead skin cells on the surface of the skin reveling a more even, smoother complexation. It is also able to stimulate collagen production with long-term use. Could help to reduce pore congestion. It can be irritating to the skin. Apply sunscreen daily if using products with glycolic acid~5.2–7.7%
Lactic acidKey activeEffect: HighAn exfoliating and moisturizing alpha-hydroxy acid (AHA). Typically causes less irritation than other AHAs, for example, glycolic acid. At high concentrations (about 15%), lactic acid can help reduce lines and wrinkles. Recent studies show that lactic acid can support the "good" bacteria living on skin's surface (healthy skin microbiome)~3.5–5.3%
Salicylic acidEffect: LowUsed for skin exfoliation. It has an anti-inflammatory and anti-bacterial effect, helps to unclog pores, prevent blemishes and speed up healing of the existing ones. Sometimes referred to as a BHA (beta-hydroxy acid)~0.1–0.5%
Anti-aging
Glycolic acid, Lactic acid + 1 more
Works well
What the product description says
“The looks of fine lines and wrinkles are visibly reduced, with discolouration balanced and renewed.”
Source: Lookfantastic

This product can help reduce and prevent fine lines and wrinkles, improve skin elasticity and firmness because it contains glycolic acid.

These ingredients in the product can also be helpful, even though there is less evidence for their effectiveness: hexanoyl dipeptide-3 norleucine acetate, lactic acid.

Keep in mind that it typically takes at least 6 weeks to notice any results because the changes that are needed to improve fine lines and elasticity happen in the deeper layers of the skin. No topical anti-aging product can “erase” wrinkles or fully reverse signs of aging.

Glycolic acidKey activeEffect: HighAn alpha-hydroxy acid (AHA) that helps to remove the dead skin cells on the surface of the skin reveling a more even, smoother complexation. It is also able to stimulate collagen production with long-term use. Could help to reduce pore congestion. It can be irritating to the skin. Apply sunscreen daily if using products with glycolic acid~5.2–7.7%
Lactic acidKey activeEffect: MediumAn exfoliating and moisturizing alpha-hydroxy acid (AHA). Typically causes less irritation than other AHAs, for example, glycolic acid. At high concentrations (about 15%), lactic acid can help reduce lines and wrinkles. Recent studies show that lactic acid can support the "good" bacteria living on skin's surface (healthy skin microbiome)~3.5–5.3%
Hexanoyl dipeptide-3 norleucine acetateKey activeEffect: MediumA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~1–1.5%
Anti-blemish
Not advertised by the brand · Salicylic acid, Glycolic acid + 1 more
Works well

This product can help reduce breakouts and clogged pores because it contains the following ingredient: salicylic acid. This ingredient is used for treating acne and can have a noticeable effect.

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

Salicylic acidHeroEffect: HighUsed for skin exfoliation. It has an anti-inflammatory and anti-bacterial effect, helps to unclog pores, prevent blemishes and speed up healing of the existing ones. Sometimes referred to as a BHA (beta-hydroxy acid)~0.1–0.5%
Glycolic acidKey activeEffect: MediumAn alpha-hydroxy acid (AHA) that helps to remove the dead skin cells on the surface of the skin reveling a more even, smoother complexation. It is also able to stimulate collagen production with long-term use. Could help to reduce pore congestion. It can be irritating to the skin. Apply sunscreen daily if using products with glycolic acid~5.2–7.7%
Salix alba bark extractEffect: LowA plant extract that can help neutralize free radicals in skin. It contains a compound salicin that can theoretically be converted into salicylic acid that, in turn, helps reduce inflammation in skin, but the evidence of effectiveness in skin is lacking and the extract is usually not used in a concentration that would enable an exfoliating effect~0.1–0.45%

Can it cause trouble?

Irritancy
14 flagged ingredients
Low risk
We flag 14 ingredients with irritancy potential; the product's overall irritancy is low. The table lists each ingredient's own rating.
IngredientFunctionIrritationEst. amount
Glycolic acidAn alpha-hydroxy acid (AHA) that helps to remove the dead skin cells on the surface of the skin reveling a more even, smoother complexation. It is also able to stimulate collagen production with long-term use. Could help to reduce pore congestion. It can be irritating to the skin. Apply sunscreen daily if using products with glycolic acidHigh~5.2–7.7%est.
PullulanCreates a thin drying film on the skin resulting in a short-term tightening effectHigh~0.15–0.65%est.
Salicylic acidUsed for skin exfoliation. It has an anti-inflammatory and anti-bacterial effect, helps to unclog pores, prevent blemishes and speed up healing of the existing ones. Sometimes referred to as a BHA (beta-hydroxy acid)High~0.1–0.5%est.
Salix alba bark extractA plant extract that can help neutralize free radicals in skin. It contains a compound salicin that can theoretically be converted into salicylic acid that, in turn, helps reduce inflammation in skin, but the evidence of effectiveness in skin is lacking and the extract is usually not used in a concentration that would enable an exfoliating effectHigh~0.1–0.45%est.
Lactic acidAn exfoliating and moisturizing alpha-hydroxy acid (AHA). Typically causes less irritation than other AHAs, for example, glycolic acid. At high concentrations (about 15%), lactic acid can help reduce lines and wrinkles. Recent studies show that lactic acid can support the "good" bacteria living on skin's surface (healthy skin microbiome)Medium~3.5–5.3%est.
Ananas sativus fruit extractA fruit extract that might help to attract water to the upper layer of the skin, but there is no evidence for any other benefits to the skinMedium~1.7–2.5%est.
ChlorphenesinA preservativeMedium~0.16–0.32%est.
Citric acidCan work as an exfoliant but is typically used to adjust the product pHMedium~1.2–1.8%est.
Phytic acidAn alpha-hydroxy acid (AHA), but is mostly used to stabilize product formulations in cosmeticsMedium~0.35–0.75%est.
Pleiogynium timoriense fruit extractA fruit extract that might help attract water to the upper layer of the skin and have some anti-oxidant effect, but evidence of effectiveness in skin is lackingMedium~0.2–0.8%est.
Podocarpus elatus fruit extractA fruit extract that might help attract water to the upper layer of the skin and might have some antioxidant properties but evidence of effectiveness in skin is missingMedium~0.2–0.75%est.
Maris salUsed to thicken the product formulation and might help to add minerals to the surface of the skin. It is used in scrubs as a physical exfoliant. Can increase sensitivity to other ingredients if left on the skin or used in high concentrationMedium~0.1–0.35%est.
Terminalia ferdinandiana fruit extractA plant extract that might have some anti-oxidant effect in skin, but evidence is lackingMedium~0.05–0.2%est.
EthylhexylglycerinA preservativeMedium~0.01–0.1%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
Glycolic acid~5.2–7.7%
Key activeIrritant · high
Irritation risk
High
Works for
Anti-agingEvens skin toneExfoliationAnti-blemish

An alpha-hydroxy acid (AHA) that helps to remove the dead skin cells on the surface of the skin reveling a more even, smoother complexation. It is also able to stimulate collagen production with long-term use. Could help to reduce pore congestion. It can be irritating to the skin. Apply sunscreen daily if using products with glycolic acid

More about Glycolic acid
Lactic acid~3.5–5.3%
Key activeIrritant · medium
Irritation risk
Medium
Works for
Evens skin toneMoisturizingExfoliationAnti-aging

An exfoliating and moisturizing alpha-hydroxy acid (AHA). Typically causes less irritation than other AHAs, for example, glycolic acid. At high concentrations (about 15%), lactic acid can help reduce lines and wrinkles. Recent studies show that lactic acid can support the "good" bacteria living on skin's surface (healthy skin microbiome)

More about Lactic acid
Sodium hydroxide~2.7–4.1%
Formula
Irritation risk
Low

Used to adjust the product's pH

More about Sodium hydroxide
Glycerin~2.1–3.2%
Formula
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
Ananas sativus fruit extract~1.7–2.5%
Irritant · medium
Irritation risk
Medium
Works for
Moisturizing

A fruit extract that might help to attract water to the upper layer of the skin, but there is no evidence for any other benefits to the skin

More about Ananas sativus fruit extract
Chlorphenesin~0.16–0.32%
Irritant · medium
Irritation risk
Medium

A preservative

More about Chlorphenesin
Citric acid~1.2–1.8%
Irritant · medium
Irritation risk
Medium

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

More about Citric acid
Hexanoyl dipeptide-3 norleucine acetate~1–1.5%
Key active
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 Hexanoyl dipeptide-3 norleucine acetate
Lecithin~0.85–1.25%
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
Lycium chinense fruit extract~0.5–1.1%
Formula
Malic acid~0.4–0.95%
Formula
Irritation risk
Low

Helps adjust the product pH

More about Malic acid
Phenoxyethanol~0.35–0.8%
Formula
Irritation risk
Low

A preservative. It helps prevent bacterial growth in cosmetic products

More about Phenoxyethanol
Phytic acid~0.35–0.75%
Irritant · medium
Irritation risk
Medium

An alpha-hydroxy acid (AHA), but is mostly used to stabilize product formulations in cosmetics

More about Phytic acid
Pleiogynium timoriense fruit extract~0.2–0.8%
Irritant · medium
Irritation risk
Medium
Works for
Anti-oxidationMoisturizing

A fruit extract that might help attract water to the upper layer of the skin and have some anti-oxidant effect, but evidence of effectiveness in skin is lacking

More about Pleiogynium timoriense fruit extract
Podocarpus elatus fruit extract~0.2–0.75%
Irritant · medium
Irritation risk
Medium
Works for
Anti-oxidationMoisturizing

A fruit extract that might help attract water to the upper layer of the skin and might have some antioxidant properties but evidence of effectiveness in skin is missing

More about Podocarpus elatus fruit extract
Pullulan~0.15–0.65%
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
Salicylic acid~0.1–0.5%
Hero · Anti-blemishIrritant · high
Irritation risk
High
Works for
Anti-blemishExfoliationAnti-inflammatoryAntibacterialEvens skin tone

Used for skin exfoliation. It has an anti-inflammatory and anti-bacterial effect, helps to unclog pores, prevent blemishes and speed up healing of the existing ones. Sometimes referred to as a BHA (beta-hydroxy acid)

More about Salicylic acid
Salix alba bark extract~0.1–0.45%
Irritant · high
Irritation risk
High
Works for
Anti-oxidationAnti-inflammatoryAnti-blemishExfoliation

A plant extract that can help neutralize free radicals in skin. It contains a compound salicin that can theoretically be converted into salicylic acid that, in turn, helps reduce inflammation in skin, but the evidence of effectiveness in skin is lacking and the extract is usually not used in a concentration that would enable an exfoliating effect

More about Salix alba bark extract
Sclerotium gum~0.1–0.45%
Formula
Irritation risk
Low

Used to create gel-like formulas and stabilize emulsions

More about Sclerotium gum
Maris sal~0.1–0.35%
Irritant · medium
Irritation risk
Medium
Works for
Exfoliation

Used to thicken the product formulation and might help to add minerals to the surface of the skin. It is used in scrubs as a physical exfoliant. Can increase sensitivity to other ingredients if left on the skin or used in high concentration

More about Maris sal
Sodium hyaluronate~0.1–0.3%
Formula
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
Sodium carrageenan~0.05–0.3%
Formula
Irritation risk
Low

Helps stabilize the product formulation

More about Sodium carrageenan
Terminalia ferdinandiana fruit extract~0.05–0.2%
Irritant · medium
Irritation risk
Medium
Works for
Anti-oxidation

A plant extract that might have some anti-oxidant effect in skin, but evidence is lacking

More about Terminalia ferdinandiana fruit extract
Xanthan gum~0.05–0.15%
Formula
Irritation risk
Low
Works for
Cleansing

Used to create a thicker product consistency

More about Xanthan gum
Ethylhexylglycerin~0.01–0.1%
Irritant · medium
Irritation risk
Medium

A preservative

More about Ethylhexylglycerin
Ingredient list view

Water, Glycolic acid, Lactic acid, Sodium hydroxide, Glycerin, Ananas sativus fruit extract, Chlorphenesin, Citric acid, Hexanoyl dipeptide-3 norleucine acetate, Lecithin, Lycium chinense fruit extract, Malic acid, Phenoxyethanol, Phytic acid, Pleiogynium timoriense fruit extract, Podocarpus elatus fruit extract, Pullulan, Salicylic acid, Salix alba bark extract, Sclerotium gum, Maris sal, Sodium hyaluronate, Sodium carrageenan, Terminalia ferdinandiana fruit extract, Xanthan gum, Ethylhexylglycerin

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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
Erno LaszloAHA Resurfacing Sleep SerumYOUR PRODUCTNécessaireThe Body Peel - Resurfacing Serum with 12% AHA/BHA/PHA, 1% Resveratrol + Peeling Peptidecolibri skincareExfoliate BoosterHydroPeptideDeluxe Mini Triple Acid Peptide Peel
Match—92%89%88%
Price—$53.59—$19.00
Shared key ingredients—5 of 75 of 75 of 7
Key difference—NiacinamideVitamin CHaematococcus Pluvialis Extract
Irritancy Low Low Low High
Drying alcohol————
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More alternatives: Deviant Skincare Gentle Resurfacing LiquidCeraVe Salicylic Acid Acne Control Gel, Acne Treatment for Face

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Sources cited in this review

Every concentration estimate and effectiveness label is anchored to one of these 17 studies and safety reviews.

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Erno Laszlo AHA Resurfacing Sleep Serum
Erno LaszloAHA Resurfacing Sleep Serum

Affiliate links · As an Amazon Associate, WIMJ earns from qualifying purchases.

As an Amazon Associate, WIMJ earns from qualifying purchases.