Is 4000 mg of vitamin C Safe?

For adults, the recommended daily amount for vitamin C is 65 to 90 milligrams (mg) a day, and the upper limit is 2,000 mg a day. Although too much dietary vitamin C is unlikely to be harmful, megadoses of vitamin C supplements might cause: Diarrhea. Nausea.

How much vitamin C can the body absorb in a day?

Oral vitamin C produces tissue and plasma concentrations that the body tightly controls. Approximately 70%–90% of vitamin C is absorbed at moderate intakes of 30–180 mg/day. However, at doses above 1 g/day, absorption falls to less than 50% and absorbed, unmetabolized ascorbic acid is excreted in the urine [4].

Can Too Much vitamin C cause cataracts?

If you want to preserve your vision as you age, you might consider tossing your vitamin C supplement. According to a study published in the February issue of the American Journal of Clinical Nutrition, high-dose vitamin C supplements – 1,000 milligrams daily – can increase the risk of developing cataracts.

When should I take vitamin C 1000mg?

How to use C-1000. Take this vitamin by mouth with or without food, usually 1 to 2 times daily. Follow all directions on the product package, or take as directed by your doctor. If you are taking the extended-release capsules, swallow them whole.

What is the recommended dosage of vitamin C?

The U.S. government recommends a daily Vitamin C dosage for adult women at 75 mg and for adult men at 90 mg.

How much vitamin C is too much?

For adults, the recommended dietary reference intake for vitamin C is 65 to 90 milligrams (mg) a day, and the upper limit is 2,000 mg a day. Although too much dietary vitamin C is unlikely to be harmful, megadoses of vitamin C supplements may cause: Diarrhea.

How much vitamin C supplement?

Use vitamin C wisely. Supplementation in amounts from 200-2000 mg per day is fine for most people, particularly in the buffered forms, going up to 10,000 mg per day when fighting an illness.