Vitamin C does not cure COVID, this and other myths are debunked. The Times of India

No. According to experts, the ideal amount of vitamin C for an adult woman should be 75 mg per day and a man should take 90 mg of vitamin C per day. Although too much dietary vitamin C is unlikely to be harmful, experts at MayoClinic say that megadoses of vitamin C supplements can cause diarrhea and nausea.

The upper limit for vitamin C is 2000 milligrams per day, but people with chronic liver disease, arthritis or kidney disease should not take more than 1,000 milligrams of vitamin C per day.