Kerstin Florian Rehydrating Algae Gel Masque

Kerstin Florian Rehydrating Algae Gel Masque

Efficacy37/100IrritancyHigh
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Works for

1 of 2 advertised claims delivered

Moisturizing
7 ingredients credited for this claim
Good support
What the product description says
“Rehydrating Algae Gel Masque”
From product name

This product contains good ingredients to attract water to the upper layer of the skin. These ingredients are called "humectants": glycerin, methyl gluceth-20.

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. If the air is dry, humectants can speed up the moisture loss from the skin. This is why it is a good idea to use another product on top of this one to help "seal in" the moisture (look for ingredients like dimethicone, squalane, oils and butters).

Chondrus crispusKey activeEffect: HighRed algae extract that helps attract water to the upper layer of the skin and create a nicer product consistency~1.2–1.9%
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~4.1–6.2%
Chlorella vulgaris extractKey activeEffect: MediumA plant extract that can help to attract water to the upper layer of the skin and might have some anti-oxidant and anti-inflammatory properties~0.1–0.45%
Methyl gluceth-20Key active· HumectantEffect: MediumHelps attract water to the upper layer of the skin and soften it~2.7–4%
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~3.5–5.2%
Caprylic/capric triglycerideUnder-dosedEffect: 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~0.4–0.9%
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~0.1–0.35%
Evens skin tone
1 ingredient credited for this claim
Weak support
What the product description says
“Harnessing antioxidant and mineral rich Algae extracts, the gel formula works to detoxify skin and neutralise environmental aggressors, while extract of Everlasting Flower Water helps purify and tone for a more even and smooth surface.”
Source: Recreate Yourself

Effective ingredients missing or their concentration is too low

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~0.1–0.4%

Can it cause trouble?

Irritancy
7 strong irritants: Menthyl lactate, Parfum + 5 more — patch-test recommended
High risk
We flagged 21 ingredients with irritancy potential. Severity depends on your sensitivity threshold; the table lists the worst offenders first.
IngredientFunctionIrritationEst. amount
Menthyl lactateUsed as a fragrance. Can be irritatingHigh~0.15–0.6%est.
ParfumAn aromatic blend of unspecified and possibly irritating ingredientsHigh~0.15–0.55%est.
Santalum album oilUsed as a fragrance. Can be irritatingHigh~0.15–0.55%est.
Benzyl alcoholA preservative. Can be used to mask unpleasant smell. Can be irritatingHigh~0.1–0.4%est.
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~0.1–0.4%est.
Ci 19140A yellow dyeHigh~0.05–0.3%est.
CitronellolA fragrance. Can be irritatingHigh~0.05–0.2%est.
GeraniolA fragrance. Can be irritatingHigh~0.05–0.15%est.
LinaloolA fragrance. Can be irritatingHigh~0.05–0.1%est.
CarrageenanHelps thicken the product formula and create a nice product formulationMedium~1.1–1.6%est.
Ppg-26-buteth-26Helps oil and water mix togetherMedium~0.85–1.25%est.
EthylhexylglycerinA preservativeMedium~0.5–1.15%est.
Peg-40 hydrogenated castor oilHelps oil and water mix togetherMedium~0.4–0.9%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~0.4–0.9%est.
Disodium edtaStabilizes the product formulationMedium~0.2–0.75%est.
Tocopheryl acetateA more stable but less bio-available form of vitamin E compared to Tocopherol. Might help moisturize and protect the skin from free radicals, but mostly used in low concentrations to stabilize other ingredients.Medium~0.2–0.75%est.
Sodium benzotriazolyl butylphenol sulfonateHelps protect the ingredients in the formulation against UV lightMedium~0.15–0.65%est.
Chlorella vulgaris extractA plant extract that can help to attract water to the upper layer of the skin and might have some anti-oxidant and anti-inflammatory propertiesMedium~0.1–0.45%est.
Tributyl citrateHelps improve the product textureMedium~0.1–0.45%est.
Dehydroacetic acidA preservativeMedium~0.1–0.3%est.
Ci 42090A colorant (dye)Medium~0.1–0.35%est.
Comedogenic
3 ingredients rated 2 or more on the 0–5 pore-clogging scale
3 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
Chondrus crispusRed algae extract that helps attract water to the upper layer of the skin and create a nicer product consistency3/5~1.2–1.9%est.
CarrageenanHelps thicken the product formula and create a nice product formulation3/5~1.1–1.6%est.
Chlorella vulgaris extractA plant extract that can help to attract water to the upper layer of the skin and might have some anti-oxidant and anti-inflammatory properties3/5~0.1–0.45%est.
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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~4.1–6.2%
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
Butylene glycol~3.5–5.2%
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
Methyl gluceth-20~2.7–4%
Key active
Irritation risk
Low
Works for
Moisturizing

Helps attract water to the upper layer of the skin and soften it

More about Methyl gluceth-20
Carbomer~2–3%
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
Helichrysum italicum flower water~1.7–2.5%
Formula
Phenoxyethanol~0.5–1%
Formula
Irritation risk
Low

A preservative. It helps prevent bacterial growth in cosmetic products

More about Phenoxyethanol
Chondrus crispus~1.2–1.9%
Key activeComedogenic 3/5
Irritation risk
Low
Comedogenicity
3/5
Works for
Moisturizing

Red algae extract that helps attract water to the upper layer of the skin and create a nicer product consistency

More about Chondrus crispus
Carrageenan~1.1–1.6%
Comedogenic 3/5Irritant · medium
Irritation risk
Medium
Comedogenicity
3/5

Helps thicken the product formula and create a nice product formulation

More about Carrageenan
Ppg-26-buteth-26~0.85–1.25%
Irritant · medium
Irritation risk
Medium

Helps oil and water mix together

More about Ppg-26-buteth-26
Ethylhexylglycerin~0.5–1.15%
Irritant · medium
Irritation risk
Medium

A preservative

More about Ethylhexylglycerin
Sodium hydroxide~0.4–0.95%
Formula
Irritation risk
Low

Used to adjust the product's pH

More about Sodium hydroxide
Peg-40 hydrogenated castor oil~0.4–0.9%
Irritant · medium
Irritation risk
Medium
Works for
Cleansing

Helps oil and water mix together

More about Peg-40 hydrogenated castor oil
Caprylic/capric triglyceride~0.4–0.9%
Under-dosedIrritant · 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
Xanthan gum~0.3–0.7%
Formula
Irritation risk
Low
Works for
Cleansing

Used to create a thicker product consistency

More about Xanthan gum
Buteth-3~0.3–0.7%
Formula
Irritation risk
Low
More about Buteth-3
Disodium edta~0.2–0.75%
Irritant · medium
Irritation risk
Medium

Stabilizes the product formulation

More about Disodium edta
Tocopheryl acetate~0.2–0.75%
Irritant · medium
Irritation risk
Medium
Works for
Anti-oxidation

A more stable but less bio-available form of vitamin E compared to Tocopherol. Might help moisturize and protect the skin from free radicals, but mostly used in low concentrations to stabilize other ingredients.

More about Tocopheryl acetate
Sodium benzotriazolyl butylphenol sulfonate~0.15–0.65%
Irritant · medium
Irritation risk
Medium

Helps protect the ingredients in the formulation against UV light

More about Sodium benzotriazolyl butylphenol sulfonate
Menthyl lactate~0.15–0.6%
Irritant · high
Irritation risk
High

Used as a fragrance. Can be irritating

More about Menthyl lactate
Parfum~0.15–0.55%
Irritant · high
Irritation risk
High

An aromatic blend of unspecified and possibly irritating ingredients

More about Parfum
Santalum album oil~0.15–0.55%
Irritant · high
Irritation risk
High

Used as a fragrance. Can be irritating

More about Santalum album oil
Salicornia herbacea extract~0.1–0.45%
Formula
Benzyl alcohol~0.1–0.4%
Irritant · high
Irritation risk
High

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

More about Benzyl alcohol
Retinyl palmitate~0.1–0.4%
Under-dosedIrritant · high
Irritation risk
High
Works for
Evens skin toneAnti-blemishAnti-agingExfoliation

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
Chlorella vulgaris extract~0.1–0.45%
Key activeComedogenic 3/5Irritant · medium
Irritation risk
Medium
Comedogenicity
3/5
Works for
MoisturizingAnti-oxidationAnti-inflammatory

A plant extract that can help to attract water to the upper layer of the skin and might have some anti-oxidant and anti-inflammatory properties

More about Chlorella vulgaris extract
Pelvetia canaliculata extract~0.1–0.45%
Formula
Tributyl citrate~0.1–0.45%
Irritant · medium
Irritation risk
Medium

Helps improve the product texture

More about Tributyl citrate
Dehydroacetic acid~0.1–0.3%
Irritant · medium
Irritation risk
Medium

A preservative

More about Dehydroacetic acid
Ci 42090~0.1–0.35%
Irritant · medium
Irritation risk
Medium

A colorant (dye)

More about Ci 42090
Tocopherol~0.1–0.35%
Formula
Irritation risk
Low
Works for
Anti-oxidationAnti-agingAnti-inflammatoryMoisturizing

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
Ci 19140~0.05–0.3%
Irritant · high
Irritation risk
High

A yellow dye

More about Ci 19140
Citronellol~0.05–0.2%
Irritant · high
Irritation risk
High

A fragrance. Can be irritating

More about Citronellol
Geraniol~0.05–0.15%
Irritant · high
Irritation risk
High

A fragrance. Can be irritating

More about Geraniol
Linalool~0.05–0.1%
Irritant · high
Irritation risk
High

A fragrance. Can be irritating

More about Linalool
Ingredient list view

Water, Glycerin, Butylene glycol, Methyl gluceth-20, Carbomer, Helichrysum italicum flower water, Phenoxyethanol, Chondrus crispus, Carrageenan, Ppg-26-buteth-26, Ethylhexylglycerin, Sodium hydroxide, Peg-40 hydrogenated castor oil, Caprylic/capric triglyceride, Xanthan gum, Buteth-3, Disodium edta, Tocopheryl acetate, Sodium benzotriazolyl butylphenol sulfonate, Menthyl lactate, Parfum, Santalum album oil, Salicornia herbacea extract, Benzyl alcohol, Retinyl palmitate, Chlorella vulgaris extract, Pelvetia canaliculata extract, Tributyl citrate, Dehydroacetic acid, Ci 42090, Tocopherol, Ci 19140, Citronellol, Geraniol, Linalool

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Amazon USPrice as of 10/17/2026 00:09 GMT
$65.00
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Kerstin Florian Rehydrating Algae Gel Masque
Kerstin FlorianRehydrating Algae Gel Masque

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As an Amazon Associate, WIMJ earns from qualifying purchases.