Jerry Brainum tells all you need to know about the largest and most complex of all vitamins, Vitamin B12.How much do you need, and what are the best supplemental forms of this nutrient. For more in-depth information about nutrition, exercise science, ergogenic aids, hormonal therapy, fat-loss techniques that work, supplement truths, and many other topics, subscribe today to Jerry Brainum’s Applied Metabolics newsletter ( The best source, by far, of evidence-based knowledge available.

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