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Not only is excessive protein consumption linked to a dramatic rise in cancer mortality, but middle-aged people who eat lots of proteins from animal sources -- including meat, milk and cheese -- are also more susceptible to early death in general, reveals the study to be published March 4 in Cell Metabolism. Protein-lovers were 74 percent more likely to die of any cause within the study period than their more low-protein counterparts. They were also several times more likely to die of diabetes. (...)
Crucially, the researchers found that plant-based proteins, such as those from beans, did not seem to have the same mortality effects as animal proteins.
Quelle: http://www.sciencedaily.com/releases/2014/03/140304125639.htm
Es wird die Empfehlung gegeben, im mittleren Alter höchstens 0,8 g Protein pro kg Körpergewicht täglich zuzuführen, um das Risiko chronischer Erkrankungen zu minimieren. Ob das wohl auch für Veganer relevant ist, die auf Soja verzichten? Dr. Greger hat einige Clips online, nach denen Sojaprotein einen ähnlich starken Einfluss auf den IG1-Spiegel hat wie tierisches Protein. Protein aus anderen pflanzlichen Quellen habe diesen Effekt allerdings nicht, da die BW niedriger sei.
Edit: Die zugrundeliegende Studie ist Im Volltext zugänglich - http://www.cell.com/cell-metabolism/fulltext/S1550-4131%2814%2900062-X
