Biotin

Biotin is one of the most talked-about hair ingredients — and one of the most overstated. Here’s what the research actually shows, stated plainly.

Description

What is it?

Biotin (Vitamin B7) is a water-soluble vitamin involved in the metabolic processes that support healthy hair and nail growth. It’s a hugely popular hair-care ingredient, sold both as an oral supplement and as a topical addition to shampoos and serums.

What does it actually do?

A systematic review found real evidence is limited to people with an underlying deficiency or condition. According to PubMed, a review of biotin for hair loss (Patel DP, Swink SM, Castelo-Soccio L. “A Review of the Use of Biotin for Hair Loss.” Skin Appendage Disorders, 2017) found 18 reported cases showing clinical improvement with biotin supplementation — but in every case, the patient had an underlying pathology causing poor hair or nail growth (such as biotin deficiency or brittle nail syndrome). The review concludes there is a “lack of sufficient evidence for supplementation in healthy individuals.” (DOI)
A newer randomized trial found oral biotin supplementation reduced hair fall and increased growth rate. According to PubMed, a randomized, double-blind, placebo-controlled trial in 97 participants (Patel MN, Maheshvari J, Patel N. “The Role of Sesbania grandiflora-Derived Biotin and Bambusa arundinacea-Derived Silica Extracts in Promoting Hair, Skin, and Nail Health.” Cureus, 2025) found that a 90-day course of oral biotin supplementation significantly reduced hair fall and increased hair growth rate compared with placebo, with no adverse events reported. (DOI)

(Note: both trials test ORAL biotin supplementation — a capsule taken daily — not the topical, rinse-off form formulated into a shampoo or leave-in serum. A 2025 review of hair and skin supplements also flags that biotin can interfere with common lab tests (thyroid and cardiac troponin panels), a caution worth knowing even for oral use (Shing V, Aragon Sierra A, Shah AA. “Benefits and risks of hair, skin, and nail supplements in older adults.” International Journal of Women’s Dermatology, 2025. DOI). Mystic Dust’s topical biotin is included for its general hair-conditioning and film-forming properties, not as a claim that it replicates the hair-fall or growth-rate results seen with oral supplementation above)

Who is it good for?

General hair-care support, as part of a broader routine — the strongest hair-growth evidence available is for oral use in people with an underlying deficiency, not topical alone.

No real precautions for topical use.

How Mystic Dust uses it

Formulated in the Hair Growth Shampoo, Hair Growth Serum and Anti-Frizz Hair Serum.

Pairs well with

Anagain, Redensyl, Saw Palmetto — the other hair-fall-focused actives in the same range.

Use with caution alongside

Nothing specific for topical use.

Research & Findings

According to PubMed: -

Patel DP, Swink SM, Castelo-Soccio L. “A Review of the Use of Biotin for Hair Loss.” Skin Appendage Disorders, 2017;3(3):166-169. DOI

Patel MN, Maheshvari J, Patel N. “The Role of Sesbania grandiflora-Derived Biotin and Bambusa arundinacea-Derived Silica Extracts in Promoting Hair, Skin, and Nail Health: A Randomized, Double-Blind, Placebo-Controlled Clinical Study.” Cureus, 2025;17(7):e89118. DOI

Shing V, Aragon Sierra A, Shah AA. “Benefits and risks of hair, skin, and nail supplements in older adults.” International Journal of Women’s Dermatology, 2025;11(4):e236. DOI