What are Glycine Max (Soybean) Polypeptides?

They are protein fragments derived from soybeans, used in cosmetics for their skin and hair conditioning properties.

How do soybean polypeptides benefit the skin?

They help to moisturize the skin, improve its texture, and can offer some protection against environmental damage due to their antioxidant activity.

Are Glycine Max (Soybean) Polypeptides safe for sensitive skin?

Generally, they are well-tolerated, but as with any ingredient, individual sensitivities can occur. Patch testing is always recommended.

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Glycine Max (Soybean) Polypeptide

Glycine Max (Soybean) Polypeptide is a plant-derived ingredient extracted from soybeans. It functions as a humectant and film-former, helping to attract and retain moisture in the skin and hair. This can lead to improved hydration, smoother texture, and enhanced elasticity. It also offers mild antioxidant properties, contributing to overall skin and hair health.

NoneSkin/Hair Conditioning AgentVeganEvidence: Medium

BenefitGood 2.5 / 4

Hydration i2.5 / 4

Whether the ingredient helps increase the skin’s water content — humectants that attract water, ingredients that reduce water loss, or ones that make skin feel less dry.

Texture i1.5 / 4

Whether it can improve smoothness and surface texture — roughness, flaking, clogged pores, or unevenness. Exfoliating acids, retinoids, and smoothing moisturizers may score here.

Barrier support i1.5 / 4

Whether it supports the skin barrier — restoring lipids, reducing water loss, aiding barrier repair, or strengthening the skin’s protective function.

Anti aging i1.5 / 4

Whether it can help visible signs of aging — fine lines, wrinkles, loss of firmness, or photoaging.

RiskLow 0.5 / 4

Sensitization i0.5 / 4

Risk of allergic contact dermatitis or immune-based reactions. Fragrance allergens, preservatives, botanicals, and some dyes may score here.

Rated by SpottyLabs' ingredient methodology, independent of brands.

What it helps with

Hydrates skin and hair
Improves skin and hair texture
Provides antioxidant protection

Things to watch

Potential for rare allergic reactions

See how this matches your skin

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Products with Glycine Max (Soybean) Polypeptide

LANEIGE

Glaze Craze Tinted Lip Serum

4.5/ 510/13/3

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Frequently asked questions

What are Glycine Max (Soybean) Polypeptides?: They are protein fragments derived from soybeans, used in cosmetics for their skin and hair conditioning properties.
How do soybean polypeptides benefit the skin?: They help to moisturize the skin, improve its texture, and can offer some protection against environmental damage due to their antioxidant activity.
Are Glycine Max (Soybean) Polypeptides safe for sensitive skin?: Generally, they are well-tolerated, but as with any ingredient, individual sensitivities can occur. Patch testing is always recommended.