Biosilk is a conditioning treatment for brittle and dry hair. It contains silk extracts which the company claims makes the hair shiny and manageable. Found in beauty supply and drug stores, the product comes in a 2-oz. bottle and costs about $13.


Cyclomethicone and dimethicone are silicone-like chemicals that are used to coat the hair follicles. In Biosilk, it is used to lay the hair flat so that it is shiny and looks healthy.


Biosilk also have panthenol (Vitamin B5) to help the hair roots and scalp maintain moisture. Moisture is trapped in the hair follicles, which prevents it from drying out.


Biosilk contains three different preservatives; phenoxyethanol, methylparaben and propylparaben. These preservatives keep the other ingredients fresh and from molding while in the bottle.

Silk Proteins

Ethyl ester of hydrolyzed silk is the silk protein used in Biosilk. This product is used as a repairing agent to make the hair shaft smooth after it has been damaged.


The sun can have damaging effects on the hair. This is why Biosilk has included Octyl-MethoxyCinnamate that acts as a sunscreen.