Description : How much vitamin C should an adult consume per day? What if we accidentally consume too much of it?
Last Answer : If you asked a company that sells vitamin C, they would say 1000-5000mg a day. But most people actually only need 80-100mg, going beyond 2000mg can actually be harmful. As this vitamin is ... is the same molecule. Symptoms of overdose may include heartburn, nausea, diarrhea, bloating, and headache.