Why might someone throw up whenever they take iron pills?

Stomach irritation: Iron is a known irritant to the stomach. If iron supplementation is needed and person cannot tolerate oral iron, iron can be given intravenously. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex, if you have sex.