With the use of BioSilk Silk Therapy you create shiny and soft locks. Biosilk contains 17 of the 19 amino acids that are naturally present in the hair, repairing damaged particles and closing the scales. This way Biosilk prevents split ends. The silk in this serum prevents damage by using, for example, your flat iron, curling iron and hair dryer. You use Silk Therapy in washed or unwashed hair and on both dry and damp hair.