Silk is made up of two primary proteins; a fibrous protein known as fibroin, and a sticky protein known as sericin, with the two comprising 70–80% and 20–30% of silk

.

Silk Powder

The component of Silk Powder is fibroin. Silk Powder retain natural cocoon silk's original physical structure and chemical composition. It is 100% natural silk protein powder with molecular weight of about 300,000 and it is no taste, no smell, and can not be dissolved in water or ethanol.

Silk Amino Acids

The component of Silk amino acids (SAAs) is the free amino acids and less amount of di-peptide and tri-peptide with the average molecular weight of 90. It is also called fibroin-90.

It is a non-animal protein source used as an additive in skin and hair care products due to its high levels of serine which has excellent moisture preservation characteristics.

Silk Peptide

Silk peptide is a kind of silk proteinic product with smaller molecular weight consisted by 18 kinds of amino acids. Its molecular weight is generally between 300 to 2000 with better water soluble property but not dissolved in organic solvent. The silk peptide in large molecular weight has a good membranate-forming character, and the silk peptide of low molecular weight is easy to be absorbed by skin.