While vitamin C is essential for health, high doses can cause serious side effects. Learn the risks and how to use it safely, ...

Symptoms of a vitamin C deficiency include weakness, bruising, and dry skin. Learn more about the warning signs and how to ...

High-dose vitamin C causes digestive distress in most people, including diarrhea, nausea, abdominal cramps, and bloating. These aren’t minor side effects—they’re signs that your digestive ...

High-dose vitamin C can cause false negative results on fecal occult blood tests, potentially masking gastrointestinal bleeding that might indicate colorectal cancer or other serious conditions.

Is this intravenous infusion of Vitamin C truly the miracle solution that it is being deemed or is it just another wellness fad that needs more caution than you think? Experts reveal.

High doses of vitamin C, particularly those above 2,000 mg daily, may increase the risk of kidney stones in susceptible individuals. Vitamin C is metabolized into oxalate, which can contribute to ...

A University of Iowa Health Care randomized, phase 2 clinical trial shows that adding high-dose, intravenous (IV) vitamin C to chemotherapy doubles the overall survival of patients with late-stage ...

Which fruits are high in vitamin C? ... The safe upper limit is 2,000 milligrams a day, though the nutrient doesn’t cause serious problems even at high doses, the NIH notes.

Products with a higher concentration can be irritating to the skin, and in very high doses can be toxic. ... Typically, you get what you pay for, but each “dose” of vitamin C is different.