Tocopherol
Tocopherol, also known as Vitamin E, is the major fat-soluble antioxidant found in the skin and encompasses four subtypes: alpha, beta, gamma, and delta tocopherol. It is derived from both natural (denoted 'd-') and synthetic (denoted 'dl-') sources, with the natural form shown to be more active and better absorbed. In cosmetic formulations, it functions as an antioxidant, skin-conditioning agent, and masking ingredient. It is considered easy to formulate, stable, and relatively inexpensive.
Tocopherol protects skin cells from free-radical damage, helping to preserve collagen integrity. It provides notable photoprotection primarily against UVB rays, reducing sunburn cell production and inhibiting photocarcinogenesis. When combined with Vitamin C (especially at ~15%), the two work synergistically to provide broad-spectrum photoprotection with doubled effectiveness.
Comedogenicity is rated 0–3 (variable). Tocopherol should not be applied to surgical scars for wound healing purposes — multiple studies have failed to demonstrate benefit and some showed worsened outcomes. It does not protect against UVA-caused skin issues such as sagging when used alone.
