casa |  | Saúde e Doença >  | Condições e Tratamentos | Queda de Cabelo

B-Complex 50 and Hair Growth: Evidence Review

B-Complex 50 supplements provide all eight B vitamins at ~50 mg/mcg each. Evidence for direct hair growth promotion is limited.

Individual B Vitamins & Hair

VitaminRoleEvidence for Hair Growth
Biotin (B7)Coenzyme for carboxylases; keratin infrastructureOnly helps if deficient (rare); no benefit in replete individuals.
Niacin (B3)Circulation, NAD+ metabolismTopical niacinamide may improve barrier; oral evidence weak.
Pantothenic acid (B5)CoA synthesis; lipid metabolismNo clinical trials supporting hair growth.
Riboflavin (B2)FAD/FMN; energy productionDeficiency causes hair loss; supplementation only helps if deficient.
Thiamine (B1)Energy metabolismNo direct hair growth data.
B6, B9, B12Homocysteine, DNA synthesis, RBC formationDeficiency → hair loss; correction helps, but excess no added benefit.

Bottom Line

  • B-complex corrects deficiencies that impair hair.
  • No RCT shows B-Complex 50 enhances growth in nutrient-replete people.
  • Excess B6 (>100 mg/day long-term) can cause neuropathy.

Better Approach

  • Screen for iron, zinc, vitamin D, thyroid, androgens.
  • Protein adequacy (0.8–1 g/kg).
  • Minoxidil 5% (FDA-approved for androgenetic alopecia).
  • Address underlying cause (telogen effluvium, alopecia areata, etc.).
Queda de Cabelo

direitos autorais © www.365saude.com.br Saúde e Doença