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View Full Version : How much Vitamin A is too much?



T-Baby
08-20-2007, 06:46 PM
I think the FDA or whatever "official" organization that monitors such things said 10,000 IU. However, I think it used to be 25,000 IU before they changed it.

I've been taking 24,000 IU per day. Does this seem unsafe?

I'm taking a natural Vitamin A softgel, with the ingredients of soybean oil, gelatin, glycerin, and fish liver oil. It also contains soy, menhadden, and herring.

Any replies are appreciated.

Rippedtohell
08-20-2007, 06:52 PM
dont quote me on this, but I believe if you ingest beta carotene it will convert to Vitamin A when your body needs it.

droxas
08-20-2007, 06:56 PM
http://ods.od.nih.gov/factsheets/vitamina.asp

This is so not my department, so hopefully someone with more education can chime in.

GermanBarbarian
08-20-2007, 08:59 PM
I think the FDA or whatever "official" organization that monitors such things said 10,000 IU. However, I think it used to be 25,000 IU before they changed it.

I've been taking 24,000 IU per day. Does this seem unsafe?

I'm taking a natural Vitamin A softgel, with the ingredients of soybean oil, gelatin, glycerin, and fish liver oil. It also contains soy, menhadden, and herring.

Any replies are appreciated.

To be honest the government says that the ingestion of vitamins A and D can be up to 10x the levels they currently have them set as. *note* vitamins A is only found in animal products, the fact that the liver in a person's body has to convert carotene's to vitamin A is were the 'toxicity' comes into play when ingesting carotenes. Basically on a daily basis try to get 150-200% of your RDI of vit. A and D (since you are active) and you can eat just about as much vitamin A (from animals) as you want, the only known 'overdose' of vitamin A (from animal source) was when artic explorers ate polar bear liver which has sever million IU of Vitamin A.

siamesedream
08-20-2007, 09:26 PM
If you ever kill a polar bear, just don't eat its liver and you're good.

in10city
08-21-2007, 01:25 AM
I think the FDA or whatever "official" organization that monitors such things said 10,000 IU. However, I think it used to be 25,000 IU before they changed it.

I've been taking 24,000 IU per day. Does this seem unsafe?

I'm taking a natural Vitamin A softgel, with the ingredients of soybean oil, gelatin, glycerin, and fish liver oil. It also contains soy, menhadden, and herring.

Any replies are appreciated.
Depends on the form... preformed Vitamin A may be toxic with long-term consumption in excess of 10 times the RDA (8,000 to 10,000 mcg/day or 25,000 to 33,000 IU/day). Carotenoids do not exhibit the same toxic effects if consumed in excess doses...

http://lpi.oregonstate.edu/infocenter/vitamins/vitaminA/