According to Mayo Clinic, too much vitamin C in adults is any amount over 2 grams per day. The recommended dose of vitamin C for an adult is 60 to 95 milligrams a day. More »

Too much vitamin C can be bad for people, according to WebMD. Overdosing on vitamin C can lead to stomach cramps, nausea and diarrhea. It commonly results from taking too many supplements. More »

According to the USDA, a medium-sized orange contains approximately 69.7 milligrams of vitamin C, while a small orange contains 51.1 milligrams, and a larger one 97.9 milligrams. The Mayo Clinic states that the recommend... More »

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The recommended dietary reference intake for vitamin C is 65 milligrams each day. Exceeding the daily limit can result in side effects including kidney stones, insomnia, headache, cramps, bloating, heartburn, nausea, dia... More »

DermNet NZ describes topical vitamin C as an antioxidant that can be applied to the skin to provide protection against photoaging. Photoaging of the skin occurs with exposure to sunlight and can be worsened by cigarette ... More »

According to Mayo Clinic, consuming too much vitamin C is unlikely to be harmful or to cause an overdose. Too much vitamin C may, however, result in undesirable symptoms, such as diarrhea, nausea, vomiting, heartburn, ab... More »

Doctor's Best's Best Vitamin C, chewable Now C-500, Olympian Labs C-1000 and Infinite Labs Vitamin C are the top choices for vitamin C tablets at The Alliance for Natural Health USA recommends the Now a... More »