|Vitamin A promotes enzyme activity in the skin, which helps to thicken the epidermis and can regenerate skin prematurely aged by UV-radiation. This ingredient can also assist in increasing the skin's elasticity and the reversal of photodamage. The amount used in our products is generally safe under normal use; however, pregnant women or those with skin problems should discuss vitamin A use with their doctor or dermatologist. As vitamin A can also increase your skins sensitivity to the sun, it is best used at night. Try our Ultimate Serum to reap the benefits of vitamin A.