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.
Yogurt is also a good source of calcium, potassium, and Vitamin D. Serving Size (1 cup), 1.49 micrograms of Vitamin B12 (25% DV), 137 calories. A Vitamin B12 deficiency may be marked by such symptoms as anemia, weakness, pale skin, weight loss, or upset stomach.