Taking too many vitamins and supplements may cause health problems, including vitamin toxicity, interactions, ...

B vitamins help your body produce or use the energy from your diet. They also help produce red blood cells. Because B vitamins also affect your metabolism, taking excess vitamins in a B complex ...

While prenatal vitamins help ensure you and your growing baby get the nutrition you need during pregnancy, they can cause some unpleasant side effects. "After all, pregnancy and nursing take a lot out ...

Taking too much vitamin D causes side effects like nausea, vomiting, weakness, and abdominal pain. The average adult should take no more than 4,000 international units of vitamin D daily. Vitamin D ...

Vitamin D3, a form of vitamin D that we get from certain foods and exposure to sunlight, is an essential nutrient that plays a role in many bodily functions. This fat-soluble vitamin helps the body ...