I've listened to a few discussions with Rhona Patrick and I found her to be very informative. Peter Attia does sometimes come across as being so far down the medical research rabbit hole that I can see how it would occasionally make him unrelatable - some of his episodes get very technical, and at other times he spends way too much time reminiscing about doctors or hospitals that he and his guest have in common. However, I find the info he has on his podcast is always backed up with studies, and he is humble enough to not rest on his expertise and to allow himself to be surprised when the research does not coincide with his preconceptions.
I seem to recall watching one of the earlier episodes of Rhoda Patrick's podcast where she interviewed Attia, and there seemed to be a lot of tension between them. They have very different opinions on the significance of the gut biome.
The issue I have with a lot of the more "researchy" type pop-science health gurus is that they cloak themselves in a thick layer of scienscism to lend more credibility to their theories, which are only thinly more scientific than the rest. Attia had made a huge deal of research only for the research from his own institute to not support his theories.
Now legitimately, he has stated that that is just preliminary research and doesn't rule out what he's saying, which is fair, but it also doesn't mean that he's got more scientific support than others.
The thing is, it's so incredibly difficult to study nutrition in an effective AND ethical way, which is why there's so little definitive science on it.
That's why any pop culture "guru" who claims to possess some special "truth" about health and nutrition gets a solid side eye from me and other medical professionals/scientists.
Besides, it's not really scientific factual support that people need to eat better, it's psychological support. People generally know when their diet is crappy, and that doesn't stop them from eating crappy diets. Everyone knows that exercise is beneficial and yet almost nobody does enough of it.
Knowing more about nutrition and fitness only does so much, but understanding the basis of habit formation, motivation, and stress management are critical.
I've always said that the best diet is a good therapist.
We all generally know how to take care of ourselves, but we generally don't. Understanding the basis of that is fundamental.