Most individuals use multivitamins, one of the most popular dietary supplements. People frequently use multivitamins to maintain or improve their health, guard against nutrient deficiencies, or fill in the occasional dietary gap in their diet. Multivitamins are available without a prescription and are generally considered safe, which may account for their popularity. Multivitamins are not without danger, despite this. So, can vitamin supplements cause headaches ? Read on to learn more. Vitamins That May Cause Headaches Different people may respond differently to vitamin and mineral supplementation. The same supplement may have various adverse effects in different people or none at all. Here are a few vitamins that could be the cause of your headache. Too Much Vitamin C Taking large amounts of vitamin C is typical, especially during the cold and flu season. Even though excess vitamin C migraine trigger is eliminated in urine since it is a water-soluble vitamin, too high dos...