Healthy Hair Vitamins

A B vitamin found in almost every hair and nail formula, frequently at many times the reference intake. Deficiency is rare in people eating a varied diet. Typical serving across the market: 50µg – 5000µg. Published human research: moderate.

A mineral with authorised claims for skin, hair and nails. Worth checking the total across everything you take, as it is in most multivitamins too. Typical serving across the market: 5mg – 15mg. Published human research: extensive.

A trace mineral with authorised claims for hair, nails and immune function. Needed in tiny amounts, and easy to double up across products. Typical serving across the market: 55µg – 200µg. Published human research: extensive.

Collagen taken from fish skin, broken into short chains so it dissolves easily. Sold at anything from 2.5g to 15g a serving, which is the main reason prices look so different. Typical serving across the market: 2.5g – 10g. Published human research: moderate.

A molecule that holds water, found naturally in skin. Oral doses used in studies are small, typically well under a tenth of a gram. Typical serving across the market: 80mg – 200mg. Published human research: moderate.

A sulfur compound used in joint and hair/skin products. Sold at gram-level amounts; the research is mixed but generally well tolerated. Typical serving across the market: 250mg – 3000mg. Published human research: moderate.