Poor science Poor, unsupported scientific conclusions lacking causation. It appears somewhat ideological to me.

Life changing Hilarious that the negative reviews state that he doesn't site sources. His organization and book goes through literally tens of thousands of studies every year. I can only assume the negative reviews come from biased employees of certain industries, or they've never actually read a single thing he has written and are just turned off my having to face the reality that what they are eating is probably killing them.

Brilliant science communication This website is incredibly helpful for navigating the confusing world of nutrition science. Dr Gregor is a brilliant communicator as he explains scientific studies in a way that the general public can understand. He just lays out the evidence for us so we can make informed decisions. I do have a background in science and I read scientific papers for fun and I've checked on his sources to make sure he was communicating them accurately. He is one of the only nutrition doctors that I trust as most are just making content will sell for profit. The website is non-commercial and non-profit as well as his books (all proceeds are donated to charity!) and Daily Dozen app. I've been using this site for years now and it's been so helpful for making sound nutrition decisions. No more fad diets!

Ideologically biased -

Mediterranean or Icelandic diets give longevity. As a scientist myself, this "research" is biased. Arguing for a plant only diet as a cure all, is misunderstanding human metabolism and claiming something it cannot deliver. If you only eat plants you will have to supplement with Vit B12, iron and certain amino acids. Eating a mediterranean, Japanese or Icelandic diet has far more evidence of longevity.