Can Lactic acid be applied to hands and fingers?

Yes. The Lactic acid peel is generally considered the best peel to help dry and wrinkled skin. Lactic acid has several things that make it the best in fighting dry skin. First, the Lactic acid is a natural humectant which occurs naturally in the skin, and because of this it is capable of pulling moisture from the air and preserving it in the skin. The lactic acid is less irritating and more moisturizing than the glycolic, and the lactic can be used at a slightly higher concentration than the glycolic. Also, the lactic acid has a larger molecular size. This helps the Lactic acid to work more on the surface of the skin. Because of this it does not stimulate collagen growth as much as the glycolic.

The glycolic fights wrinkles by going beneath the skin and stimulating collagen growth. The lactic acid works more on the surface of the skin pulling moisture inside the cells and plumping them up. Both work to help wrinkles, but they work in different ways. Finally, Lactic acid was originally derived from mammalian milk, and is part of the human physiology. This seems to make it a little better tolerated than the glycolic acid, so it can be used in slightly higher concentration. You still want to be careful applying the lactic peel on the hands. Start slowly and do not leave on for very long at first… maybe 1 min, because you do not want to irritate the skin, especially around the knuckles as this part of the skin moves throughout the day. It will take 5-6 treatments to notice the best results, but most people start to notice a change immediately.