Best ingredients for hair & nails

Enzymatically hydrolyzed collagen from bovine hide or bone, delivering short peptides rich in glycine, proline, and hydroxyproline.

Typical: 2.5–15 g

The most common zinc salt in multivitamins, lozenges, and immune products, containing about 14.3% elemental zinc.

Typical: 10–25 mg

Zinc chelated with picolinic acid, a tryptophan metabolite that is proposed to aid mineral transport across the gut wall.

Typical: 10–25 mg

Biotin is a water-soluble B vitamin that serves as the cofactor for five carboxylase enzymes in fatty acid, glucose, and amino acid metabolism.

Typical: 300–5,000 mcg

A lipid-sterol extract of saw palmetto berries, standardized to fatty acids, that is the most widely used botanical in men's prostate and urinary-comfort products.

Typical: 320 mg

MSM is an organic sulfur compound found in small amounts in plants, milk, and the body.

Typical: 1,500–3,000 mg

Zinc chelated with two glycine molecules, sold as a gentle, well-absorbed form for people who get nausea from zinc salts.

Typical: 10–25 mg

Hydrolyzed type I collagen from fish skin and scales, positioned as a pescatarian-friendly and lower-molecular-weight alternative to bovine collagen.

Typical: 2.5–10 g

Copper chelated with two glycine molecules, supplying about 25% elemental copper in commercial grades.

Typical: 0.5–2 mg

A copper salt of gluconic acid, about 14% elemental copper, and one of the most widely used copper sources in multivitamins because it is water soluble, inexpensive, and has a long safety record.

Typical: 0.5–2 mg

An extract of bamboo stem and leaf standardized to a high silica content, typically about 70%, making it the most concentrated botanical silica source and a staple of hair, skin, and nail formulas.

Typical: 100–500 mg

An extract of the aerial parts of field horsetail, a plant that accumulates silica in its cell walls and has a long traditional use for hair, nails, and connective tissue.

Typical: 200–500 mg

A low-molecular-weight bovine or marine collagen hydrolysate used at milligram doses in gummies and chews, where the matrix cannot hold the multi-gram servings used in research.

Typical: 100–500 mg

Pumpkin seed extract is derived from the seeds of Cucurbita pepo and is rich in phytosterols, tocopherols, and zinc-bearing proteins.

Typical: 500–1,000 mg

An essential sulfur-containing amino acid that starts every protein chain and is the precursor to S-adenosylmethionine, the body's main methyl donor, as well as cysteine and glutathione.

Typical: 500–1,000 mg

Cynatine HNS is a branded, solubilized keratin produced from New Zealand sheep's wool by a patented process that keeps the protein bioavailable.

Typical: 500 mg