Applying vitamins topically delivers the maximum benefits to the skin, according to an article on MSNBC. The article also outlines why vitamins A, B3, C, E and K are good for the skin and when to apply them for optimum benefits.
Vitamin A and its derivatives, known as retinoids, have been proven to reduce wrinkles, fade brown spots and smooth roughness. The article suggests applying retinoids at night because sunlight inactivates it.
Vitamin B3, sometimes called niacinamide on the label, increases production of ceramides and fatty acids, two key components of the skin's outer protective barrier. For best results apply at night and in the morning, which may also help reduce any irritation caused by the retinoid.
Moisturizers fortified with vitamin C (at least 5 percent or higher) can help reduce free radical damage, sagging and other aging changes. The article says it’s best to apply vitamin C in the morning before sunscreen to help protect skin from UV-generated free radicals.
The best vitamin E products contain at least 1 percent vitamin E, which can reduce dryness and neutralize free radicals. Apply before and after sun exposure.
For younger, brighter eyes, the article says to look for eye creams that contain vitamin K.