iHerb Customer Reviews
CAUTION FOR ASTHMA / LOW IRON - depletes other nutrients and *causes* asthma
18 people found the following review helpful
Posted by Health-Is-Wealth on Nov 23, 2013
Vit A increases transferrin - higher doses can be detrimental to anyone low in iron, asthmatics, etc. I do not recommend vit A in this dose because it is too effective - used regularly, it causes me to get breathless (in a very unpleasant way) and I end up having to supplement other things to compensate (when they're normally not necessary). Suggest limited/occasional use only. I want a natural vit A, however it seems impossible to find one in lower doses, especially one that isn't cod. If this review was helpful to you, please click YES below - thank you. For reviews of all the products I have purchased from iHerb, please click my username above.
Avoid cod liver oil & check your multivitamins
6 people found the following review helpful
Posted by Hungarian on Sep 11, 2014
Vitamin D & Vit A as Retinol: More recent research has discovered that the ratios of these two vitamins may be of paramount importance in order to extract optimal health benefits, and unfortunately, modern cod liver oil does not supply these vitamins in healthy ratios to each other. People who took vitamin A supplements in cod liver oil, or in supplements, had an 18 percent increase in death rates. Cod liver oil that is clearly excessive in vitamin A as it only has 3 to 60 units of vitamin D per tablespoon but between 150 and 12,000 times as much vitamin A. Both vitamins are essential to obtain optimal health benefits, however, the ratios can become dangerously unbalanced -- much like the omega-3/omega-6 balance, which has become inversed in our modern diet. Cod liver oil is a highly processed food that was never consumed by humans prior to recent times. Dr. John Cannell, of the Vitamin D Council, recommends not taking vitamin A as retinol, (as in cod liver oil), because the vitamin A blocks the positive actions of vitamin D. Dr. Cannell raised questions about the efficacy of cod liver oil due to its highly variable and frequently excessive amount of vitamin A. Typically modern cod liver oil contains far less vitamin D than it used to, due to the deodorization process used today which removes much of this essential nutrient. Dr. Cannell and other prominent researchers believe the vitamin A contained in most cod liver oil is excessive, and can reduce the effectiveness of vitamin D by inhibiting the binding of its active form to your DNA, effectively preventing its ability to regulate the expression of your vitamin D-responsive genes.
5 people found the following review helpful
Posted by Reviewer2387412 on Jan 21, 2011
Have used this with zinc and Granda's acne soap and now my skin is almost perfect. Not even one pimple on my face. I use to have like 5-10 pimples all the time before started to take these, but hard to say how much this product has helped or is it good combination with zinc. I still give 5 stars cos i'm so happy to my face right now :)
like it, like this brand
3 people found the following review helpful
Posted by Reviewer1526191 on Apr 09, 2011
Check the maximum healthy dosage of vitamins A and D3 before taking large doses (I just googled the information and found several credible sources). Too much at one time or too large doses over a long period of time can really hurt your health. As with most things, moderation is good.
excellent price, excellent strength!
2 people found the following review helpful
Posted by andrewleehorton on Jul 07, 2011
don't forget to take this with Vitamin D - otherwise you'll be deficient.