Vitamin A (retinoids), its toxicity and how it blocks Vitamin D activity

Since Vitamin D is an important topic I'm posting this info that some of you may have not come across yet.

Extract:

There’s mounting evidence that vitamin D protects against a number of cancers, including colon cancer. But paradoxically, researchers found that many of those with higher vitamin D levels do not seem to have this benefit. Again – it’s likely to be all about the ratios.

A bright Harvard researcher carefully analyzed the data and found that when he removed the people with high vitamin A and high vitamin D levels, those with normal vitamin A levels and high vitamin D levels continued to have reduced risk of colon cancer.

Hence, those who did not supplement with vitamin A gained the protective effect from higher levels of vitamin D!

Please check the following links:

http://articles.mercola.com/sites/articles/archive/2009/01/03/why-vitamin-a-may-not-be-as-useful-or-harmless-as-you-thought.aspx

http://articles.mercola.com/sites/articles/archive/2008/12/23/important-cod-liver-oil-update.aspx


Current Dr. Mercola's recommendation is to drop Cod Liver oil (he favors Krill oil since some time ago) because it contains pre-formed Vitamin A and other reasons.

If you are taking any multi, the best thing is to use the ones that contain only natural carotenoids and no pre-formed retinoids. Leave that to your body...