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Biotin
Primary Use / Function: Supports healthy hair, skin, and nails; aids in metabolism of fats, carbohydrates, and amino acids
Daily Dose Range: 30–10,000 mcg (common doses for hair/skin/nails are 2,500–5,000 mcg)
Frequency: Once daily
With Food? Optional, but can be taken with food to avoid stomach discomfort
Enhancing Combinations：Silica, Collagen, B-Complex
Gender Specific：No
Contraindications / Cautions: May interfere with lab tests (e.g., thyroid, cardiac markers); stop 72 hours before blood work
Notes: Often included in beauty supplements; deficiency is rare but may cause hair thinning or brittle nails
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