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Some Valuable Information! Jun 02, 2010
By J. Hagg
"Wholly His"
What rating should I give "Dark Deception?" The book is an understandable, informational read on the subjects of sunshine and vitamin D. The author, Dr. Joseph Mercola's preferred way to obtain your essential vitamin D is from moderate sun exposure. Ten minutes a day is all you need to get 10,000 IU of the vitamin and all the rest of the sun's health promoting properties. Once the body makes that much D from the sun, it shuts off its production of any more D at that time, which it does not do with supplemental vitamin D. Also vitamin D from the sun is not retained in the body for long periods of time, as is supplemental vitamin D. This makes an overdose of supplemental vitamin D that much more harmful. Also, while the sun is definitely a healing source, it can also be a potent disease producing substance (melanoma is but one example) when you get to much of it (overdose). So far I agree with Dr. Mercola. I also agree with his views on the toxic properties in sunscreens and his advice to stay away from them. His advice on sleep and the production of serotonin and melatonin is excellent.
Having said all of that, you would think that I would give the book a five star review (a no brainier), but while Dr. Mercola admits that in Northern climates, (where I live in Northern Wisconsin fits that description), taking a supplemental form of D in the winter is acceptable, he seems overly concerned about their toxic effects. While the man contends that 10,000 IU a day from the sun is a truly health promoting way to go, he seems overly fearful concerning the harm of even food source cod liver oil supplementation. If you use even small amounts of supplemental vitamin D (for example, 800 IU in 2 teaspoons of cod liver oil) you should be continually having your vitamin D levels checked. I know that the sun has healthful properties, other than simply supplying vitamin D, that render it non toxic at appropriate doses. Mercola does a great job of explaining this important fact. Even so, most other vitamin D experts recommend 1,000-2,000 IU a day of supplemental vitamin D. Some experts recommend even higher daily doses of supplemental D, which I disagree with. Because a certain amount is essential, doesn't mean more is better. In fact it may be worse and be toxic to your body. Mercola makes this point well. My question is, "Even though according to Mercola the D in cod liver oil is concentrated, does 800 IU give you enough Vitamin D for health?" He provides a formula for determining how much cod liver one should take daily based on their weight.
I agree with Dr. Mercola that the the A and D in cod liver oil, which is a food supplement, do work in synergism to prevent each other from becoming toxic. I also very much like the EPA and DHA in cod liver oil, which not only play a vital role in proper cellular function, but also act as brain food. That is why, like Mercola, I prefer cod liver oil over other forms of vitamin D supplementation for people unable to receive it from the sun. Having said all that I gave the review four stars and would definitely recommend you read it and benefit from all the excellent information it does contain.
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