All medications have side effects. Hives, constipation, dry mouth, and headaches are common side effects in a lot of drugs. But in some cases certain side effect combinations can indicate an allergic reaction instead of being a side effect. Be sure to read the specific warnings on the drug to be sure.
Vitamin C. Vitamin C is good for your hair growth and healthy skin. Vitamin C may help your skin look younger, according to the Mayo Clinic. Vitamin C plays an essential role in forming collagen. Collagen, a protein, stimulates skin production, according to the National Institutes of Health.
What the Science Says. Hair, skin, and nail supplements commonly contain antioxidants such as vitamins A, C, and E, or Coenzyme Q10, as well as biotin, a B-Â­complex vitamin. The minerals manganese and selenium are often found in supplements marketed for healthy hair, along with fatty acids such as fish oil and flaxseed oil.