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A 49-year-old member asked:

Is 1000mg vitamin c too much for a day?

1 doctor answer1 doctor weighed in
Dr. Doina Marina
Anti-Aging Medicine 53 years experience
Yes. : Recommended dietary allowance (rda) for vitamin c in mg/day infants 0-6 months: 40 7-12 months: 50 children: 1-3 years: 15 4-8 years: 25 9-13 years: 45 girls: 14-18 years: 65 boys: 14-18 years: 75 men: age 19 and older: 90 women: age 19 and older 75 smokers or if around secondhand smoke at any age, add 35 mg/d. Higher amounts of vitamin c are needed during pregnancy and breastfeeding.

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A 30-year-old member asked:

Is 1000mg vitamin C a lot?

2 doctor answers4 doctors weighed in
Dr. Thomas Namey
Rheumatology 48 years experience
Controversial!: I believe 300mg per day is enough. Some physicians believe that 1000mg/day is ok. I disagree!
ZA
A 31-year-old male asked:

I take 1000mg Vitamin C tablets a day?

1 doctor answer2 doctors weighed in
Dr. Lauren Bickel
Specializes in Family Medicine
More info: If you are asking if it is ok to take 1000mg Vitamin C tabs, yes, that is ok for most people (I take them myself actually). Our bodies get rid of the Vitamin C we don’t use so it is impossible to overdose, though some people get stomach irritation with too much. VitC is a good antioxidant, helps immune system, & aids wound healing, though the best dose is uncertain.
A 48-year-old member asked:

Side effects of vitamin C at 1000mg a day - is that a lot?

1 doctor answer3 doctors weighed in
Dr. Randy Baker
Holistic Medicine 40 years experience
Usually none & no: Vitamin c is extremely safe. Excessive doses (usually over 5000 mg a day) can cause a laxative effect. Vit. C can interact with certain medications, esp. Coumadin (warfarin) (which interacts with everything!). Concerns that high doses of vit c can cause kidney stones are unproven, in fact there is no good evidence of harm from high doses of c. See http://lpi.Oregonstate.Edu/infocenter/vitamins/vitaminc/.
A 31-year-old member asked:

What can happen if you have too much vitamin c?

1 doctor answer2 doctors weighed in
Dr. Heidi Fowler
Psychiatry 25 years experience
Vitamin C: Taking excessive amounts of Vitamin C can cause symptoms such as nausea, vomiting, loose stools, heartburn, abdominal cramping, bloating,headache and insomnia. It may be associated with oxalate renal calculi. It can lead to hemolytic anemia in patients with g6pd deficiency. Large doses of Vitamin C are contraindicated w g6pd deficiency, renal insufficiency, oxalate renal calculus formers, chronic
Dr. Heidi Fowler
Psychiatry 25 years experience
Provided original answer
hemodialysis or in some forms of iron overload.
Aug 8, 2014

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Last updated Apr 18, 2021

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