Q&A: How much vitamin A, in a day, is considered toxic?
How much vitamin A, in a day, is considered toxic?
I heard that Vitamin A toxicity can occur at doses of 15000 IU in a day? Just curious, how many percent of the recommended daily intake is that? An 8 ounce glass of carrot juice contains about 630% of the recommended daily intake, is this over 15000 IU? Is there an equation to convert IU to the percentage? What is IU in general?
Thanks for your time!
Best answer:
Answer by Improfane
http://www.chiroweb.com/archives/11/07/06.html
Some people have symptoms with 50,000 IU a day yet the article says people suffering from acne were taking 1 million a day with no side effects!
Depends on the person!
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The recommended daily intake of Vitamin A is 3000IU for men and 2333IU for women. A safe limit for most people is 10000IU to 25000IU per day, depending on which research you use. The Vitamin A upper limit for those over 65 and with liver problems is 10000-15000IU/day.
Keep in mind that the RDA (recommended daily allowance) is usually the absolute minimum suggested for proper nutrition, so exceeding the RDAs a little is not usually a risk. Check with a medical professional before taking action.
The 630% should not be a concern. Much of the Vitamin A in carrots comes from beta carotene, which the body converts into Vita A as needed. Getting your Vita A from beta carotene is a good way to avoid getting “too much” Vitamin A, since your body will only convert what it needs in to Vita A.
If you’re taking Vitamin A supplements and medication, there is a chance that they may reduce the effectiveness of each other. You check here for a list of medications and Vitamin A: http://www.cncahealth.com/health-notes.htm?org=cnca&ContentID=3250005
I hope that helps!