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Cyclomethicone

Cyclomethicone is a clear, alcohol free, and odorless liquid which is added to personal skin care products to give them a smoother texture that is more easily applied to the skin. Safety assessments published by the International Journal of Toxicology indicate that minimal percutaneous absorption was associated with this ingredient and the available data do not suggest skin irritation or sensitization potential. Also, it is not likely that dermal exposure to this ingredient from cosmetics would cause significant systemic exposure. The Cosmetic Ingredient Review expert panel concluded that this ingredient is safe in the present practice of use and concentration.

SOURCE:

Johnson, W., Bergfled, W., Belsito D., Hill R., Klaassen C., Liebler D., Marks J., Shank R., Slaga T., Snyder P., & Andersen F. (2011). Safety assessment of cyclomethicone, cyclotetrasiloxane, cyclopentasiloxane, cyclohexasiloxane, an cycloheptasiloxane. International Journal of Toxicology, 30 (6), 149S-227S. doi: 10.1177/1091581811428184