Results: The combination of 15% L-ascorbic acid and 1% -tocopherol provided significant protection
against erythema and sunburn cell formation; either L-ascorbic acid or 1% -tocopherol alone also was
protective but the combination was superior. Application during 4 days provided progressive protection
that yielded an antioxidant protection factor of 4-fold. In addition, the combination of vitamins C and E
provided protection against thymine dimer formation.