Amino Acids — Allergy Risk & Safety Profile
INCI: ARGININE
Also known as: L-Arginine
Key Facts
- CAS Number
- 74-79-3
- Category
- humectant
- Risk Level
- safe
- Common Allergen
- No
Is Amino Acids safe in cosmetics?
Amino Acids is rated safe risk in cosmetic products. It is not classified as a common allergen and is generally well-tolerated by most skin types. Safer alternatives include Glycerin, Hyaluronic Acid, Aloe Vera.
What is Amino Acids?
Part of skin's Natural Moisturizing Factor. Helps maintain hydration.
Allergy & Safety Information
Amino Acids is considered safe for cosmetic use. No significant safety concerns have been identified at typical use concentrations. As with any cosmetic ingredient, discontinue use if irritation occurs.
About Humectant Ingredients
Humectants attract water molecules from the environment and from deeper skin layers, drawing moisture into the stratum corneum. They are among the safest cosmetic ingredients — molecules like glycerin, hyaluronic acid, and panthenol have extremely low sensitisation rates and are well-tolerated by almost all skin types.
Relevance for Amino Acids: In very low humidity environments, humectants can draw moisture out of the skin rather than into it. This is particularly relevant for high-molecular-weight hyaluronic acid applied to dry skin without an occlusive layer to seal moisture in.
How to Identify Amino Acids in Products
Cosmetic ingredients are listed by their INCI (International Nomenclature of Cosmetic Ingredients) name in descending order of concentration. To check whether a product contains Amino Acids, scan the ingredient list for its INCI name exactly as it appears above. Ingredients present at 1% or less may appear in any order after the 1% threshold.
Not sure if your products contain Amino Acids? Paste the ingredient list into the free ingredient checker to scan for Amino Acids and other allergens automatically.
Safer Alternatives
These ingredients serve a similar function with lower allergy risk:
Frequently Asked Questions
Is Amino Acids safe for sensitive skin?
Amino Acids is generally well-tolerated, even by sensitive skin types.
What products contain Amino Acids?
Amino Acids is found in various cosmetic and personal care products including skincare, haircare, and body care products.
What does Amino Acids do in cosmetics?
Amino Acids functions as a humectant in formulations.
Related Guides
Ceramide Moisturizers & Barrier Repair
How ceramide moisturizers repair the skin barrier.
How to Read Ingredient Labels
Decode INCI names and find hidden allergens in your products.
Find Your Skin Allergy Trigger
Step-by-step elimination method to identify your trigger.
Contact Dermatitis Guide
Symptoms, causes, patch testing, and treatment options.
Is Amino Acids causing YOUR skin reactions?
SkinDetekt tracks your products and reactions to find your personal triggers. Download the app to find out.
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