can vit c cause diarrhea
High doses: of Vitamin C can cause diarrhea, and some people are more sensitive to Vitamin C than others. Generally only high doses >2000mg can cause side effects like upset stomach and diarrhea. The diarrhea may be due to an osmotic effect from the high levels of Vitamin C. This draws more water back into the intestines to help dilute the Vitamin C, which then leads to diarrhea. Hope this helps! ...Read more.
That may sound like a way to help cover your nutritional bases, especially if your diet is less than stellar. But routinely getting an overload of vitamins and minerals can hurt you. Too much vitamin C or zinc could cause nausea, diarrhea, and stomach cramps. Too much selenium could lead to hair loss, gastrointestinal upset, fatigue, and mild nerve damage.