10 DEC 2013 by ideonexus

 Vitamins Come from Living Things

Every vitamin is made by living cells — either our own, or in other species. Vitamin D is produced in our skin, for example, when sunlight strikes a precursor of cholesterol. A lemon tree makes vitamin C out of glucose. Making a vitamin is often an enormously baroque process. In some species, it takes 22 different proteins to craft a vitamin B12 molecule. While a protein may be made up of thousands of atoms, a vitamin may be made up of just a few dozen. And yet, despite their small size, v...
Folksonomies: evolution biology vitamins
Folksonomies: evolution biology vitamins
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They are part of our universal chemistry from our common origins.

21 JUL 2013 by ideonexus

 People Who Take Supplements are Less Healthy

Antioxidation vs. oxidation has been billed as a contest between good and evil. The battle takes place in cellular organelles called mitochondria, where the body converts food to energy, a process that requires oxygen and so is called oxidation. One consequence of oxidation is the generation of electron scavengers called free radicals (evil). Free radicals can damage DNA, cell membranes, and the lining of arteries; not surprisingly, they've been linked to aging, cancer, and heart disease. To ...
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People who eat lots of fruits and vegetables have lower incidence of cancer and other diseases, but people who take nutritional supplements meant containing high doses of the nutrients found in fruits in vegetables die at much higher rates.