Soy Acid
Soy acid is a mixture of fatty acids derived from soybean oil. It primarily consists of linoleic acid, oleic acid, palmitic acid, and stearic acid. In cosmetics, it functions as an emollient, helping to soften and smooth the skin, and can also act as an emulsifying agent.
Fatty acid blendVegan
BenefitModerate 1.5 / 4
Hydration i1.5 / 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.
Soothing i0.5 / 4
Whether it can calm the skin — linked to less redness, irritation, discomfort, or visible reactivity.
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
- Softens and smooths skin
- Provides emollient properties
Things to watch
- Potential for allergic reaction in individuals with soy allergy
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Frequently asked questions
- What is soy acid used for in skincare?
- Soy acid is used in skincare products primarily for its emollient properties, which help to moisturize and soften the skin. It can also contribute to the texture and stability of formulations.
- Is soy acid safe for sensitive skin?
- Soy acid is generally considered mild, but as with any ingredient derived from a common allergen like soy, individuals with soy allergies should exercise caution. Patch testing is always recommended for those with sensitive skin.
