Active ingredient

Biotin

INCI · Biotin

Biotin is a water-soluble B-vitamin (vitamin B7) used topically in haircare for scalp products and conditioning treatments. It is a cofactor for carboxylase enzymes that participate in keratin precursor metabolism. Topical evidence for hair growth is weaker than oral supplementation in deficient patients; cosmetic claims should stay conservative. No major conflicts.

Last reviewed by BIOSAR Scientific Team, PharmD, Cosmetic Chemistry, Pharmacy practice on April 28, 2026.

Pregnancy and breastfeeding

No specific caution is known for cosmetic use during pregnancy or breastfeeding. If you are unsure, ask your doctor or pharmacist.

Topical biotin is considered safe during pregnancy and lactation per Mother to Baby. Biotin is an essential nutrient with no known cosmetic-dose toxicity.

Mechanism in detail

What Biotin does

Vitamin B7, a building block the hair fiber relies on. Applied in leave-on hair and scalp formulas, it supports stronger, more resilient-looking strands and a healthier, more vital scalp.

Where it helps

Concerns Biotin addresses

Aging
The first time you notice it is rarely a wrinkle. It is a quality of light — the way your skin catches it differently in a morning mirror, or the photo where you look more tired than you feel. The mechanism is real (collagen synthesis slows; elastin fragments; barrier turnover lengthens), but the felt experience comes first. Serenity Age is the range BIOSAR built for that pivot — Retinol for visible renewal and collagen support, peptides selected for documented signaling activity, and the SPF discipline that protects every other active you apply.
Dullness
Dull skin is the visible loss of luminosity, where the surface appears flat, grey, or fatigued instead of light-reflective. The underlying causes are dead-cell accumulation on the stratum corneum, dehydration, microcirculation impairment, and oxidative stress. Effective treatment combines gentle exfoliation (alpha- and beta-hydroxy acids), antioxidant serums (vitamin C, niacinamide), barrier hydration, and consistent broad-spectrum SPF. Visible improvement typically arrives within two to four weeks of a structured routine, matching the natural cell-turnover cycle of healthy skin.
Hair Loss
For the months you have been finding more hair on the pillow than the comb. For the part line that has slowly widened. For the new mother, the man at the temple recession, the woman watching her ponytail thin — hair loss is a quiet anxiety that most people carry alone for too long before they ask anyone. The Hairmical range is built around the actives that the dermatology and trichology literature considers most defensible for visible shedding: Procapil's three-mechanism complex, caffeine for follicular microcirculation, biotinyl-tripeptide for follicle anchoring. Topical actives work on the follicle's clock — give them 4 to 8 weeks of consistent use for visible improvement, and months for a full growth cycle.