Kobayashi

Kobayashi Be Cura Whitening Lotion - 2 Types

Name: Kobayashi - Be Cura Whitening Lotion - 2 Types
Brand: Kobayashi

Efficacy75/100IrritancyMedium

See all ingredients

Works for

Moisturizing

Dipotassium glycyrrhizate, Glycerin + 3 more

Works

What the product description says

“Contains hyaluronic acid (moisturizing) to moisturize the skin.”

Source: Yesstyle

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

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).

Dipotassium glycyrrhizateKey active· HumectantEffect: HighA salt derived from licorice. Works as an emollient to soften the upper layer of the skin and can help calm down inflammation. Might be helpful for skin lightening~0.3–0.75%

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~0.2–0.75%

Sodium hyaluronateKey active· HumectantEffect: HighOne of the best moisturizing ingredients. Attracts water into the upper layer of the skin~0.05–0.3%

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~1.9–2.8%

Chondrus crispus extractUnder-dosedRed algae extract that helps attract water to the upper layer of the skin and create a nicer product consistency~0.01–0.05%

Evens skin tone

Ascorbyl glucoside, Dipotassium glycyrrhizate

May help

What the product description says

“Be Cura Whitening Lotion - 2 Types”

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, dipotassium glycyrrhizate.

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~0.1–0.4%

Dipotassium glycyrrhizateEffect: LowA salt derived from licorice. Works as an emollient to soften the upper layer of the skin and can help calm down inflammation. Might be helpful for skin lightening~0.3–0.75%

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.

Anti-aging

Side benefit the brand mentions · Ascorbyl glucoside

May help

What the product description says

“Brand from Japan Kobayashi. It is a medicated lotion for the skin that causes wrinkles on the entire face.”

Source: Yesstyle

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.

Can it cause trouble?

Irritancy

1 strong irritant: Alcohol

Medium risk

We flagged 5 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~7.3–10.9%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~0.5–1.15%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~0.4–0.9%est.

Potassium hydroxideUsed to adjust the pH level of productsMedium~0.15–0.6%est.

Citric acidCan work as an exfoliant but is typically used to adjust the product pHMedium~0.05–0.15%est.

Comedogenic

1 ingredient rated 2 or more on the 0–5 pore-clogging scale

1 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 crispus extractRed algae extract that helps attract water to the upper layer of the skin and create a nicer product consistency3/5~0.01–0.05%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

Alcohol~7.3–10.9%

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

Dipropylene glycol~3.6–5.4%

Formula

Irritation risk: Low

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

More about Dipropylene glycol

Paraben

Not recognized

Polyglyceryl-3 decyltetradecyl ether~2.3–3.4%

Formula

Irritation risk: Low

Works for

Cleansing

More about Polyglyceryl-3 decyltetradecyl ether

Butylene glycol~1.9–2.8%

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

Carbomer~1.4–2.1%

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

Polyglyceryl-3 decyltetradecyl ether~1.2–1.8%

Formula

Irritation risk: Low

Works for

Cleansing

More about Polyglyceryl-3 decyltetradecyl ether

Dipotassium glycyrrhizate~1–1.5%

Key active

Irritation risk: Low

Works for

MoisturizingAnti-inflammatoryEvens skin tone

A salt derived from licorice. Works as an emollient to soften the upper layer of the skin and can help calm down inflammation. Might be helpful for skin lightening

More about Dipotassium glycyrrhizate

Glycerin~0.85–1.25%

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

Ascorbyl glucoside~0.5–1.15%

Key activeIrritant · medium

Irritation risk: Medium

Works for

Anti-oxidationAnti-agingEvens 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

Sodium citrate~0.4–0.9%

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

Dipotassium glycyrrhizate~0.3–0.75%

Key active

Irritation risk: Low

Works for

MoisturizingAnti-inflammatoryEvens skin tone

A salt derived from licorice. Works as an emollient to soften the upper layer of the skin and can help calm down inflammation. Might be helpful for skin lightening

More about Dipotassium glycyrrhizate

Sodium hyaluronate~0.2–0.75%

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

Cherry leaf extract

Not recognized

Glycerin~0.2–0.75%

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

Potassium hydroxide~0.15–0.6%

Irritant · medium

Irritation risk: Medium

Used to adjust the pH level of products

More about Potassium hydroxide

Prune enzymatic decomposition product

Not recognized

Ascorbyl glucoside~0.1–0.4%

Key activeIrritant · medium

Irritation risk: Medium

Works for

Evens skin toneAnti-agingAnti-oxidation

More about Ascorbyl glucoside

Sodium hyaluronate~0.05–0.3%

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

Citric acid~0.05–0.15%

Irritant · medium

Irritation risk: Medium

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

More about Citric acid

Potassium hydroxide~0.05–0.15%

Irritant · medium

Irritation risk: Medium

Used to adjust the pH level of products

More about Potassium hydroxide

Magnolia obovata extract~0.01–0.05%

Formula

Irritation risk: Low

More about Magnolia obovata extract

Chondrus crispus extract~0.01–0.05%

Under-dosedComedogenic 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 extract

Ingredient list view

Water, Alcohol, Dipropylene glycol, Unknown, Polyglyceryl-3 decyltetradecyl ether, Butylene glycol, Carbomer, Polyglyceryl-3 decyltetradecyl ether, Dipotassium glycyrrhizate, Glycerin, Ascorbyl glucoside, Sodium citrate, Dipotassium glycyrrhizate, Sodium hyaluronate, Unknown, Glycerin, Potassium hydroxide, Unknown, Ascorbyl glucoside, Sodium hyaluronate, Citric acid, Potassium hydroxide, Magnolia obovata extract, Chondrus crispus extract

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Yesstyle160 ml

$20.10

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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
	KobayashiBe Cura Whitening Lotion - 2 TypesYOUR PRODUCT	ShiseidoD Program Moist Care Emulsion	MinonAmino Moist Aging Care Lotion	KoseMoisture Mild White Perfect Gel
Match	—	43%	41%	39%
Price	$20.10	$44.20+$24.10	$34.70+$14.60	$13.60−$6.50
Shared key ingredients	—	2 of 4	3 of 4	3 of 4
Key difference	—	Dimethicone	Acetyl Hexapeptide-38	Diglycerin
Irritancy	Medium	Low	Low	Low
Drying alcohol	Contains drying alcohol	—	—	—
	View product	Shop	Shop	Shop

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Sources cited in this review

Every concentration estimate and effectiveness label is anchored to one of these 7 studies and safety reviews.

KobayashiBe Cura Whitening Lotion - 2 Types

Buy at Yesstyle$20.10 Amazon

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

Buy at Yesstyle$20.10 Amazon

As an Amazon Associate, WIMJ earns from qualifying purchases.