We know that it's generally healthier and safer to EAT your vitamins and minerals via a multi-colored array of whole plant foods. As John McDougall, MD notes: flooding the body with isolated, concentrated nutrients creates imbalances, increasing the "risk of disease and death." Thus, for years I've been taking only two supplements: B12 and D3. But, a post by Dr. Michael Greger gave me pause: Vitamin B12: The RDA is only 2.4 mcg/day; I've been taking 1,000 mcg, twice weekly,