Search Now. Find a Great Dermatologist Near You. Dry scaly skin has been associated with a number of disorders, including bacterial infections (for example, impetigo, staph infections, or erythrasma) and fungal infections (for example, tinea, also known as ringworm).
One vitamin that can upset your stomach when taken in large doses is vitamin C, also called ascorbic acid. Vitamin C plays an essential role in tissue maintenance by promoting the production of collagen -- a protein that makes up a portion of your bones, blood vessels, tendons and ligaments.
For best absorption and the least irritation to the stomach, I generally suggest taking your supplements with a meal containing fat. This is particularly important for the fat-soluble vitamins (A, D and E). Experiment with taking your supplements with lunch or dinner, if they cause you problems with breakfast.