Vitamin D is formed in the body in part by interaction with sun light. Vitamin D is considered to be an antioxidant and anticarcinogen, and may play a role in skin pigmentation. Since it can be absorbed by the skin, applying this vitamin topically can have an effect on skin's health. Vitamin D is toxic in large amounts, and megadoses should be avoided. Sunbathing, however, will not result in an overdose.
Vitamin E is an antioxidant.
It can help prevent free radical damage. Based on the observation that skin damage caused by the sun and other environmental agents are induced by free radicals, there is the possibility that vitamin E may be effective in preventing skin damage. It is being used in more and more skin preparations as a way to fend off this damage.