How Can Skin Spots And Epidermis Issues Be Treated?

Hi Doctor: When I was young, I was told that a zinc supplement was good for my fine skin. I have turned 70 years old with no previous condition. Because I am unable to take a bath two times a day, and put lotion all over the front and back of my body, is there a vitamin supplement that will help my underlying skin tissues and epidermis, which have begun to accumulate white spots over my skin? Not sores or rashes.