A type of silicone, dimethicone is one of the most frequently used emollient ingredients in moisturizers due to its gentleness and effectiveness. Dimethicone is considered a synthetic ingredient, even though it’s derived from natural silicon.
Applied to skin, dimethicone forms a permeable barrier that works to prevent moisture loss and impart a wonderfully silky feel.
Dimethicome is considered safe as used in cosmetic products.
References for this information:
International Journal of Toxicology, May 2014, pages 65S-115S
The Journal of Clinical and Aesthetic Dermatology, May 2014, pages 36-44
Dermatologic Therapy, May-June 2012, pages 229-233
Clinics in Dermatology, May-June 2012, pages 345-348
Skin Research and Technology, May 2000, pages 77-80