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  According to a study in the Journal of Nutrition, iron absorption is best from plant ferritin, which contains a thousand iron molecules rather than just single molecules found in iron supplements. Iron supplements often have GI side effects and can harm the lining of the GI tract. Ferritin is absorbed as an entire molecule.        

A Harvard study published in the Archives of Internal Medicine in March of 2012 found that red meat consumption is associated with an increased risk of total, cardiovascular, and cancer mortality. They also showed that substituting other healthly protein sources was associated with a lower mortality risk. They studied 37,000 men and 83,000 women for up to...