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.
Multivitamins can sometimes cause nausea shortly after you take them, especially if they contain the mineral iron or if you take other vitamin supplements along with your multivitamin. Iron in supplements can cause nausea, diarrhea and stomach cramps in some people, and taking multiple supplements increases the risk of getting too much of a single vitamin. This is particularly the case with the fat-soluble vitamins -- A, D, E and K -- because they're stored in the body and can thus accumulate to unsafe levels and cause adverse effects, including nausea.