Kose Kokutousei Brown Sugar Premium Whitening Lotion

Kose Kokutousei Brown Sugar Premium Whitening Lotion

Efficacy75/100IrritancyHigh

Works for

Moisturizing
Glycerin, Sodium acetylated hyaluronate + 1 more
Works
What the product description says
“Fermented brown sugar extract and highly concentrated Vitamin C derivative in this lotion brighten and moisturize skin by suppressing melanin production as well as the formation of freckles to achieve translucent complexion with less visible pores.”
Source: Yesstyle

This product contains good ingredients to attract water to the upper layer of the skin. These ingredients are called "humectants": glycerin, sodium acetylated hyaluronate.

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).

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~2.8–4.2%
Sodium acetylated hyaluronateKey active· HumectantEffect: HighA type of hyaluronic acid that works as an excellent moisturizer by attracting water into the upper layer of the skin. Is typically feels less sticky on the skin compared to the usual hyaluronic acid~1.5–2.2%
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~5.2–7.8%
Evens skin tone
Ascorbyl glucoside
May help
What the product description says
“Fermented brown sugar extract and highly concentrated Vitamin C derivative in this lotion brighten and moisturize skin by suppressing melanin production as well as the formation of freckles to achieve translucent complexion with less visible pores.”
Source: Yesstyle

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

Ascorbyl glucosideKey activeEffect: MediumA vitamin C derivative that is more stable but less potent than pure form of vitamin C. Has a potential to boost collagen production, nutralise free radicals and reduce hyperpigmentation, but the required concentration is likely to be much higher than for the pure form of vitamin C, limiting the ingredient's effectiveness in products~22–34%
Anti-oxidation
Side benefit · Ascorbyl glucoside
May help

This product contains antioxidants (ascorbyl glucoside) that might be able to help neutralize free radicals in skin to lessen the damage it gets from the UV light (sun). There is not enough evidence to confirm their effectiveness in skin though.

Ascorbyl glucosideKey activeEffect: MediumA vitamin C derivative that is more stable but less potent than pure form of vitamin C. Has a potential to boost collagen production, nutralise free radicals and reduce hyperpigmentation, but the required concentration is likely to be much higher than for the pure form of vitamin C, limiting the ingredient's effectiveness in products~22–34%
Anti-aging
Side benefit · Ascorbyl glucoside
May help

This product contains ascorbyl glucoside. This ingredient 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.

Ascorbyl glucosideKey activeEffect: MediumA vitamin C derivative that is more stable but less potent than pure form of vitamin C. Has a potential to boost collagen production, nutralise free radicals and reduce hyperpigmentation, but the required concentration is likely to be much higher than for the pure form of vitamin C, limiting the ingredient's effectiveness in products~22–34%

Can it cause trouble?

Irritancy
2 strong irritants: Alcohol, Parfum — patch-test recommended
High risk
We flagged 6 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~1.9–2.9%est.
ParfumAn aromatic blend of unspecified and possibly irritating ingredientsHigh~0.1–0.35%est.
Ascorbyl glucosideA vitamin C derivative that is more stable but less potent than pure form of vitamin C. Has a potential to boost collagen production, nutralise free radicals and reduce hyperpigmentation, but the required concentration is likely to be much higher than for the pure form of vitamin C, limiting the ingredient's effectiveness in productsMedium~22–34%est.
Disodium edtaStabilizes the product formulationMedium~0.5–1%est.
Citric acidCan work as an exfoliant but is typically used to adjust the product pHMedium~0.85–1.3%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~0.5–1.15%est.
Comedogenic
Clean of flagged comedogenic ingredients
None flagged

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Ingredients

Filter by role to see what each ingredient is doing.

Ascorbyl glucoside~22–34%
Key activeIrritant · medium
Irritation risk
Medium
Works for
Anti-agingAnti-oxidationEvens skin tone

A vitamin C derivative that is more stable but less potent than pure form of vitamin C. Has a potential to boost collagen production, nutralise free radicals and reduce hyperpigmentation, but the required concentration is likely to be much higher than for the pure form of vitamin C, limiting the ingredient's effectiveness in products

More about Ascorbyl glucoside
Water~12–18%
Formula
Irritation risk
Low

Plain old water

More about Water
Butylene glycol~5.2–7.8%
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
Brown sugar fermentation broth
Not recognized
Dipropylene glycol~3.5–5.3%
Formula
Irritation risk
Low

Helps to dissolve other ingredients in a formulation. Slows down the rate of product drying

More about Dipropylene glycol
Glycerin~2.8–4.2%
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
Alcohol~1.9–2.9%
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
Polyoxypropylene methyl glucoside
Not recognized
Sodium acetylated hyaluronate~1.5–2.2%
Key active
Irritation risk
Low
Works for
Moisturizing

A type of hyaluronic acid that works as an excellent moisturizer by attracting water into the upper layer of the skin. Is typically feels less sticky on the skin compared to the usual hyaluronic acid

More about Sodium acetylated hyaluronate
Saxifraga sarmentosa extract~1.3–1.9%
Formula
Lily extract
Not recognized
Coix lacryma-jobi ma-yuen seed extract~1.2–1.8%
Formula
Disodium edta~0.5–1%
Irritant · medium
Irritation risk
Medium

Stabilizes the product formulation

More about Disodium edta
Citric acid~0.85–1.3%
Irritant · medium
Irritation risk
Medium

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

More about Citric acid
Sodium citrate~0.5–1.15%
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
Polyoxyethylene cholesteryl ether
Not recognized
Polyoxyethylene hydrogenated castor oil
Not recognized
Sodium hydroxide~0.3–0.7%
Formula
Irritation risk
Low

Used to adjust the product's pH

More about Sodium hydroxide
Alcohol~0.15–0.65%
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
Phenoxyethanol~0.1–0.5%
Formula
Irritation risk
Low

A preservative. It helps prevent bacterial growth in cosmetic products

More about Phenoxyethanol
Methylparaben~0.15–0.3%
Formula
Irritation risk
Low

A preservative

More about Methylparaben
Parfum~0.1–0.35%
Irritant · high
Irritation risk
High

An aromatic blend of unspecified and possibly irritating ingredients

More about Parfum
Ingredient list view

Ascorbyl glucoside, Water, Butylene glycol, Unknown, Dipropylene glycol, Glycerin, Alcohol, Unknown, Sodium acetylated hyaluronate, Saxifraga sarmentosa extract, Unknown, Coix lacryma-jobi ma-yuen seed extract, Disodium edta, Citric acid, Sodium citrate, Unknown, Unknown, Sodium hydroxide, Alcohol, Phenoxyethanol, Methylparaben, Parfum

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Yesstyle
$25.97 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
KoseKokutousei Brown Sugar Premium Whitening LotionYOUR PRODUCTSEKKISEILotion ExcellentJOANNA CZECHThe TonerJ-Palletmanis Shinsui Uruhada Yuzu Lotion
Match—47%44%44%
Price—$68.00$55.00$27.80
Shared key ingredients—2 of 33 of 32 of 3
Key difference—DiglycerinAnhydroxylitolVitamin C
Irritancy High Medium Medium Medium
Drying alcohol Contains drying alcohol Contains drying alcohol Contains drying alcohol Contains drying alcohol
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More alternatives: the Torriden Store DIVE-IN Low Molecule Hyaluronic Acid TonerK-SECRET Hyaluronic Acid Secret Toner

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Sources cited in this review

Every concentration estimate and effectiveness label is anchored to one of these 4 studies and safety reviews.

  1. 1
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Kose Kokutousei Brown Sugar Premium Whitening Lotion
KoseKokutousei Brown Sugar Premium Whitening Lotion

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

As an Amazon Associate, WIMJ earns from qualifying purchases.