We can find Vitamin C abundantly in many fruits and vegetables. Vitamin C acts as a key element in collagen formation. It also works effectively as an antioxidant, stimulating the immune system. As much as you need to consume a certain amount of Vitamin V daily, it may lead to some side effects of Vitamin C overdose. For most people, a large orange or a cup of strawberries, chopped red pepper or broccoli can fill you with enough vitamin C for the day. Your body will excrete an excess of consuming vitamin C in your urine. Upper Limit Due to Vitamin C Overdose The tolerable upper limit is the highest amount of a vitamin you can take daily without suffering any side effects. According to The Merck Manuals Online Medical Library, the adequate upper limit for vitamin C is 2,000 mg per day, or 2 g. An excess of this amount could be taken into account as an overdose. Gastrointestinal Problems Common side effects of vitamin C overdose concern to the digestive tract. On the condition that you consume more than 2,000 mg of vitamin C, you may have the symptoms of severe gastrointestinal irritation and diarrhea. As well as significant discomfort, the conditions of diarrhea or vomiting can cause dehydration, indirectly leads to extreme thirst, fatigue, low urine output and reduced blood pressure. Diarrhea and vomiting is also one of the main causes leading to additional mineral imbalances in the body. Kidney Stones Our body breaks down Vitamin C into oxalate. Some oxalate is secreted in urine, nevertheless high urinary oxalate levels may cause formation of deposits. Vitamin C overdose is linked to a higher risk of oxalate kidney stones -- which is approximately 80 percent of all kidney stones. Hemochromatosis Excess iron build-up in the body causes hemochromatosis. This condition happens many due to inheritance and often affects the liver, heart and pancreas. Vitamin C aids the body to absorb iron. As much as vitamin C overdose does not cause hemochromatosis, it can make condition worse. Source: Yarulists.com