Keratin is an essential fibrous protein consisting of 18 amino acids, of which our hair, nails and skin are made up. A keratin deficiency can manifest as hair breakageThe nail plate can be damaged or cracked.

There are several ways of supplementing keratin. The most important distinction to be made is between internal and external methods. There is a large range of keratin hydrolysate supplements available on the market. Supplements are designed to be ingested - these are usually tablets or capsules.