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Beta-Carotene Conversion to Vitamin A

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I was wondering if anyone has come across any reputable source of studies done to discover what the average rate of conversion of Beta-Carotene is to Pro Vitamin A.

I found a few sources but they were vague.

Some sources say very little is converted at all

Some sources say it's 50% or higher

Some say that the uptake of Beta-Carotene is the problem, not the conversion (implying that conversion would be very high if you could uptake enough beta-carotene. Which begs the question of whether digestion of Beta-Carotene food is the culprit behind low uptake, or is low uptake genetically limited?

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I can't answer your question directly but I do know that beta-carotene is fat-soluble and therefore should be taken with fat. It's actually a good idea to use full fat dressing for your salads. We discussed this here a few weeks ago.

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your body converts as much as it needs to vitamin a

simple and true. your body stores it in your liver and is converted to vitamin A as needed. Making it, as you said, a provitamin.

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