Hyaluronic Acid — Allergy Risk & Safety Profile
INCI: HYALURONIC ACID
Also known as: HA, Sodium Hyaluronate
Key Facts
- CAS Number
- 9004-61-9
- Category
- humectant
- Risk Level
- low
- Common Allergen
- No
- Found In
- serum, moisturizer, eye cream
Is Hyaluronic Acid safe in cosmetics?
Hyaluronic Acid is rated low 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. Commonly found in serum, moisturizer, eye cream.
What is Hyaluronic Acid?
Naturally occurring substance that holds 1000x its weight in water. Gold standard hydrator.
Allergy & Safety Information
Hyaluronic Acid 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.
This ingredient is considered low risk from an allergenicity perspective. Reactions are uncommon at typical cosmetic use concentrations. However, no ingredient is universally safe — if you notice redness, itching, or irritation after using a product containing this ingredient, discontinue use and monitor whether symptoms resolve.
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 Hyaluronic Acid: 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 Hyaluronic Acid 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 Hyaluronic Acid, 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.
Product types to prioritise checking: Serum, Moisturizer, Eye cream. These product categories are the most common sources of Hyaluronic Acid exposure based on formulation data.
Not sure if your products contain Hyaluronic Acid? Paste the ingredient list into the free ingredient checker to scan for Hyaluronic Acid and other allergens automatically.
Safer Alternatives
These ingredients serve a similar function with lower allergy risk:
Frequently Asked Questions
Is Hyaluronic Acid safe for sensitive skin?
Hyaluronic Acid is generally well-tolerated, even by sensitive skin types.
What products contain Hyaluronic Acid?
Hyaluronic Acid is commonly found in serum, moisturizer, eye cream.
What does Hyaluronic Acid do in cosmetics?
Hyaluronic Acid functions as a humectant in formulations.
Related Guides
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Decode INCI names and find hidden allergens in your products.
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Step-by-step elimination method to identify your trigger.
Contact Dermatitis Guide
Symptoms, causes, patch testing, and treatment options.
Is Hyaluronic Acid causing YOUR skin reactions?
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