There are studies out there - Michael Greger seems to have quite a lot of references out there but unlike LCHF it is not (yet) in the psyche and the interest is not there. That does not mean there is no credence. Many of us were experimenting with LCHF long before the data was there. They do not start to do that until the anecdotal evidence becomes too great to ignore......
OK I looked up Dr Greger on the net, and got bombarded with pages of search entries selling his books. When I foud his website nutritionfacts.org, I did find buried a tweet of his where he stated that he used the Adventist-2 study report to back up his claims. Now I have seen this study before, and it does indeed come out with a lower all case mortality risk for vegetarians as opposed to non veggies. It divided the participants into 5 main groups, none of which was WFPB. I assume that a further trawl using the non-ovo, the non-lacto, the non-pescatorials might be interpreted as WFPB
<<<The reason I keep going back to that Adventist-2 study is that it’s not only the biggest study of those eating plant-based diets in North America, but the largest such study anywhere anytime. We owe those investigators a great debt (not to mention the 96,741 participants!). ..<<<<<
Actually they eliminated 20 odd thousand before they started so it was 73000.
I have viewed many of his videos and he has still not provided me with any description as to how the diet works, nor have I found any proper references either, even to the Adventist-2 study he cites.
I did find the following list of diseases 'cured' by WFPB in the section of videos specific to plant based diets
<<<A more plant-based diet may also help prevent Alzheimer’s disease, certain forms of cancer, diabetes, heart disease, high cholesterol, high blood pressure, and Parkinsons, age-related macular degeneration, cataracts, Crohn’s disease, gallstones, kidney stones, diverticulosis, rheumatoid arthritis, ulcerative colitis and vaginal infections
Additionally, plant-based eating may have a beneficial effect on abdominal fat, acne, aging, allergies, asthma, body odor, cellulite, childhood IQ, cognition, dysmenorrhea, eczema, gut flora, fibromyalgia, kidney stones, metabolic syndrome, menstrual breast pain, mood, multiple sclerosis, oral health, rheumatoid arthritis, waist circumference and weight control.>>>>>
Quite an impressive list if it can actually live up to it and produce the goods, I suppose one other it may cure is Metformin collywobbles.