Michael Greger, the author of that post, owns the website nutritionfacts.org. He appears to be taking the celebrity doctor career route, since his bio boasts ab

Michael Greger, the author of that post, owns the website nutritionfacts.org. He appears to be taking the celebrity doctor career route, since his bio boasts about the lectures he gives and appearing on the Dr. Oz show. Shows us something peer reviewed. Edit: I haven't found anything to definitively say Greger is a quack, but given that searching his name brings up mainly alternative medicine type sites, I remain suspicious.