The Science of Fasting

I find it interesting that the article suggests supplementation rather than getting it from the best natural source, red meat. Why pay companies that make supplements, which are never nearly as bioavailable as natural sources.
You know that vitamin got into that meat from veggie sources right? Unless you're eating liver, it'll take ~10 oz to reach the DV.

1 cup of yogurt, glass of milk, and 1 oz almonds and you're 107% DV. 1 egg is 15%. 2 eggs and a bagel get you to 45%.