I've been reading about concerns regarding the ratio of vitamin A to vitamin D (particularly in the context of cod liver oil, but more generally as well -- it might explain the inconsistent findings about vitamin A and harm to health).
To my knowledge, both vitamins are fat-soluble and stay in your body a long time, to be used as needed. Does that mean that the scheduling and distribution of A and D doses isn't important, as long as you get appropriate amounts of each over a scale of, say, a week? This seems like the most likely pattern if you're getting them from food, especially liver. Or is there an absorption / processing issue that means it's important to consume them at the same time?
Related question: The Weston A Price website makes a huge deal about finding a cod liver oil that has enough vitamin D to balance the A, which ends up meaning you have to buy obscenely expensive fermented oils from a very limited set of suppliers. Would it be just as effective to take a high-A oil and use a separate D supplement?
asked byAxialGentleman (2624)
Get FREE instant access to our Paleo For Beginners Guide & 15 FREE Recipes!
on June 15, 2013
at 07:43 PM
be careful with Vitamin A and D.......they are quite misunderstood by most clinicians and researchers.
Rarely do we need Vitamin A in supplement form.
Read this for some back ground: