What's Keratin?

Generally speaking Keratins are a fibrous structural protein, founded in mammals, birds, amphibians, reptiles. There are various types of Keratin in one single animal. Keratin is the major protein molecule of the hair and these proteins generally contain large quantities of the sulfur-containing amino acids, particularly cysteine. Helical keratin molecules twist around each other to form elongated strands called intermediate filaments, formation of covalent chemical bond. This appears to be consistent with the physiological role of the keratins, which provide a tough, fibrous matrix for the tissues in which they are found.

Human hair is approximately 14% cystine, cysteine cross-linked to form disulfide bonds.

Is any Keratin Treatment sold by Flow Keratin safe?

Yes. The treatments are not relaxers, meaning it won't damage your hair and you can perform the treatment over any other previous treatment, chemically or not, even before and after coloring, being also safe on virgin hair.