Biotin
INCI: Biotin
Also known as: Vitamin B7
Hair & ScalpactivesyntheticAnecdotal evidencePregnancy safe
55
Skinlumis Rating
Comedogenic
0/5
Irritancy
0/5
Best applied
Both
Effective range
0.05%–1%
How It Works
A B-vitamin essential for keratin synthesis. Topical efficacy is limited; dietary deficiency rare in developed countries.
Cofactor for carboxylase enzymes critical to fatty acid and amino acid metabolism, fundamental for keratin production.
pH Range
5.0–7.0
Benefits
- Supports keratin synthesis
- Hair and nail strength
Proven For
What the evidence supports.
Biotin deficiency hair/nail issues
Best For
- All skin types
Avoid If
No notable contraindications reported.
Layering Order
5/10
Mid-routine serum or treatment step.
Max Safe Concentration
1%
Concentration range in well-formulated products: 0.05%–1%
Seasonal Use
Year-round.
Nutrition Connection
Eggs, salmon, almonds, sweet potato.
Skin Signals When You Need It
- Brittle hair/nails
- Scaly dermatitis
For Estheticians & Professionals
Oral biotin can interfere with thyroid lab tests, counsel clients to pause before bloodwork.
Pairs Well With
Conflicts With
No flagged conflicts. Still, patch-test new actives.
Your Skin Compatibility
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