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A-F grade per outcome, combining overall evidence with goal-specific relevance. A = strong evidence; F = insufficient. Hover a badge for details.
2500-5000mcg (2.5-5mg) for hair/nails
Morning · with food (preferred)
Biotin capsules or tablets
1servings/day
With meals · with food
Capsule or softgel
3-6 months
3-6 months
3-6 months
4-8 weeks
2-6 weeks
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