I think Greger probably does provide good advice for people who have already decided to be vegan, but at least his website I think is not clear that it starts from a premise of veganism and then addresses health rather than starting with the question of what’s best for health. Wikipedia says Greger became a vegan as a college student when he toured a stockyard. I certainly respect that decision as a personal one, but I think his nutrition advice doesn’t clearly address his non-health reasons for recommending veganism.
Thanks Julia—I didn’t realize he had become a vegan before becoming a doctor, writing his book(s), etc. I think he probably underplays that in his writing to reach a wider audience. It does give me a bit of a reason to question his objectivity in assessing the evidence about what diet is best for health / longevity (as opposed to what is best from an animal welfare perspective). However, I did find his book to be a very thorough and evidence-based presentation of the studies that suggest a “whole food plant based” diet (distinct from a vegan diet which could = only potato chips and twinkies!) is helpful in preventing and treating diseases, particularly heart disease and diabetes.