Vitamins and minerals are essential micronutrients, and make up an important part of a balanced and healthy diet. Both vitamins and minerals interact with a number of cells and tissues within your body, allowing for proper cellular function to keep your body strong and healthy. While vitamin and mineral supplementation can prove beneficial, especially in individuals suffering from nutrient deficiencies, consuming large doses of some vitamins and minerals can lead to unpleasant digestive upset.
Vitamin C
One vitamin that, when taken in large doses, can upset your stomach 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, reports the Linus Pauling Institute at Oregon State University. Though moderate doses of vitamin C prove beneficial to the body, consuming large doses of the vitamin can lead to nausea, or other forms of digestive upset such as diarrhea. To prevent adverse side effects of taking vitamin C supplements, limit your vitamin C intake to between 75 and 125 mg per day -- the recommended daily intake recommended by the Linus Pauling Institute.
Magnesium
Magnesium -- an essential mineral -- may also cause digestive upset following over-consumption. Magnesium plays a role in several processes within the body, with adequate magnesium thought to relieve the symptoms of pre-menstrual syndrome, irregular heart rhythms, diabetes and high blood pressure, according to the University of Maryland Medical Center. However, large doses of magnesium can prove harmful, leading to nausea and vomiting, or even more severe symptoms such as low blood pressure, decreased heart rate, or even death in some cases. Avoiding consuming large doses of magnesium through dietary supplements, and consult with a physician before taking magnesium supplements, to help avoid an upset stomach and other symptoms of magnesium overdose.
Iron
Another mineral that may cause stomach or digestive upset is iron. This essential mineral plays a central role in the oxygenation of your cells and tissues. The Linus Pauling Institute explains that iron makes up a portion of hemoglobin, a protein found on red blood cells. Hemoglobin binds oxygen from the air you inhale, then carries that oxygen in your bloodstream, releasing it into your tissues. While deficiencies in iron can lead to health problems, including anemia, overdosing on iron can also lead to negative side effects. The LPI explains that iron overdose can cause nausea and vomiting, and may even lead to kidney, liver and nervous system. Always consult with a physician before taking dietary supplements, including iron, to avoid negative side effects such as an upset stomach.
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