Biotin — Allergy Risk & Safety Profile
INCI: BIOTIN
Also known as: Vitamin B7, Vitamin H
Key Facts
- CAS Number
- 58-85-5
- Category
- active
- Risk Level
- low
- Common Allergen
- No
- Found In
- hair supplement, shampoo
Is Biotin safe in cosmetics?
Biotin is rated low risk in cosmetic products. It is not classified as a common allergen and is generally well-tolerated by most skin types. Commonly found in hair supplement, shampoo.
What is Biotin?
Vitamin B7. Popular in hair growth products though topical evidence is limited.
Allergy & Safety Information
Biotin 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 Active Ingredient Ingredients
Active ingredients are formulated to produce a specific skin benefit — exfoliation, brightening, anti-ageing, or acne treatment. They work by interacting directly with skin biology, which also means they carry higher irritation potential than passive ingredients like emollients or thickeners.
Relevance for Biotin: Actives often require an adjustment period during which temporary redness, dryness, or sensitivity is normal. However, persistent reactions after 4–6 weeks of use, or reactions that worsen rather than improve, suggest true intolerance. Introduce only one active at a time to identify the cause of any reaction.
How to Identify Biotin 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 Biotin, 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: Hair supplement, Shampoo. These product categories are the most common sources of Biotin exposure based on formulation data.
Not sure if your products contain Biotin? Paste the ingredient list into the free ingredient checker to scan for Biotin and other allergens automatically.
Frequently Asked Questions
Is Biotin safe for sensitive skin?
Biotin is generally well-tolerated, even by sensitive skin types.
What products contain Biotin?
Biotin is commonly found in hair supplement, shampoo.
What does Biotin do in cosmetics?
Biotin functions as a active in formulations.
Related Guides
Anti-Aging for Sensitive Skin
The safest actives for sensitive skin and how to use them.
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 Biotin 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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