Notes on Vitamins and Minerals

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Notes on Vitamins and Minerals

The first step is to try to get adequate dietary intake of the essential vitamins and minerals through judicious food choice. There are lists of symptoms of vitamin and mineral deficiencies all over the internet and they are mostly useless--your subclinical deficiency symptoms will probably be completely different. 95% of the time that I was able to connect a nutrient to a symptom it was through trial and error and not from any of these symptom lists. For example, these sites always declare white spots on the fingernails to be a zinc deficiency, while I found the white spots to be a Vitamin C deficiency. But look at these accounts anyway, and try to form an idea of the amounts of the nutrients that might be beneficial, and where toxicity begins.

After you correct your diet you must then use your judgment whether any experimental supplementation is necessary. For example, in the cases of Vitamin A (retinol), Manganese, and Selenium (in some parts of the world), it is easy with food alone to get to levels of these nutrients which, in supplements, would be considered dangerously high. Always use caution with minerals and the fat-soluble vitamins (A, D, E, K), because the body pools of these substances change only very slowly, and you may be unable to recognize any difference until toxicity begins. Although I watch that the Vitamin A (retinol) number doesn't get out of hand, I am not particularly concerned about the Daily Value for Vitamin D--it equals about 20 seconds of sun exposure, which is a pittance if you live in a sunny place and spend time outside. The Vitamin E Daily Value seems entirely correct to me, and will only seem too high to the low-fat crowd who deny themselves the benefit and enjoyment of nuts and seeds--but supplementation of Vitamin E always made me feel worse, and there is at present no scientific basis for taking Vitamin E on faith that it will offer some hidden benefit. The Daily Value for Sodium is a suggested upper limit with little scientific basis and is not a minimum daily requirement.

With the water-soluble vitamins, the "B"s and C, the experiments are much easier because these nutrients are in a constant daily flux, and a single substantial dose can frequently tell you within a day whether anything beneficial is happening. Vitamin B-6 is reported to cause irreparable nerve damage in large doses, but usually you need only a few times the Daily Value to make an informed judgment whether supplementation is useful. And yes, you will end up with a zillion bottles of vitamins where you took two or three pills and decided you didn't need it. I do not believe I am the only one who will have found multiple B vitamin deficiencies as a consequence of eating too much carbohydrate. But when you are not deficient, B vitamin supplementation can cause unwanted effects, such as headaches or jumpy feelings, or the weirdest effect that I saw in my experiments: Vitamin B-6 supplementation always made me dream of feces, apparently because B-6 is the characteristic intestinal signature of voluminous bacteria. Although most of the vitamin and mineral Daily Values seem right to me, the value for Vitamin C is way too low.

The following are my experiences and opinions on those vitamins and minerals for which I decided the nutrient's Daily Value was meaningless, i.e., you can eat well and yet still be deficient. If I give a symptom of deficiency or excess, remember that your personal symptoms would undoubtedly be different. Don't take vitamin and mineral supplements unless you can see they are doing something and you can see what they are doing--then find the minimum amount of the supplement that accomplishes the task. The idea that you cannot know in the present that you are deficient in a vitamin or mineral is just a marketing ploy and guarantees that almost everything you take will be a placebo. Taking supplements as "insurance" doesn't insure you against anything because you don't know what you need, and if they left the nutrient out of the pill, you wouldn't be able to tell. But precise supplementation of exactly what you need makes a huge difference. And get a pill splitter--sometimes the whole tablet is just too much!

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