Beautiful — Hair, Skin & Nails

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.

A mineral often supplied as bamboo extract in beauty supplements. Frequently included for hair and nails; direct evidence is limited. Typical serving across the market: 50mg – 300mg. Published human research: emerging.

One of the few ingredients here with an authorised health claim in the UK and EU. Often included alongside collagen for that reason. Typical serving across the market: 40mg – 500mg. Published human research: extensive.

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.