We use essential cookies (authentication, your saved goals/stack) by default. With your permission we'll also enable privacy-respecting analytics (Vercel Web Analytics, anonymous load-time metrics) and error-replay diagnostics (Sentry — DOM snapshots only when an error fires) so we can fix bugs faster. Learn more
A-F grade per outcome, combining overall evidence with goal-specific relevance. A = strong evidence; F = insufficient. Hover a badge for details.
1200mg
With meals · with food
Berberine HCl capsules
2500-5000mcg (2.5-5mg) for hair/nails
Morning · with food (preferred)
Biotin capsules or tablets
4-12 weeks
8-12 weeks
First 2 weeks
3-6 months
3-6 months
Like what you see? Add these to your stack.
See how they work together through biological pathways.
Build Your StackWant to compare more supplements?