There are lectures by a number of researchers available on YouTube. I tend to rely on Stephen Phinney’s earlier talks on the Low Carb Down Under channel, especially the ones on practical issues involved with maintaining a keto diet, because he talks a lot about the underlying biology. He says he got into this line of research in order to prove Dr. Atkins wrong, and ended up proving something entirely different. Dr. Phinney and Jeff Volek did a lot of the early research into ketogenic diets and athletic performance, so Prof. Volek’s lectures can also be helpful.
Another researcher who is giving a lot of interviews lately is Prof. Benjamin Bikman, who studies the effects of the hormones insulin and glucagon, which the pancreas secretes to regulate blood sugar levels and our metabolic state. Though both hormones have other, equally important, jobs throughout the body, especially insulin.
Robert Lustig is another researcher worth paying attention to. He is a paediatric endocrinologist, a researcher, and a food advocate. His specialty is the effects of fructose on the body, plus the importance of eating real, whole foods.
Lastly, there is David Diamond, a neurologist who got interested in cholesterol because of his own health situation. He has a lot of lectures avaiable on the effects of statins and how the research into them has been deceptively presented. He is also part of a group of well-known international researchers who are trying to debunk the myth that cholesterol is the cause of cardiovascular disease. (They have an uphill battle, because statins are enormously profitable for the pharmaceutical industry.) Prof. Diamond’s more recent talks and intervews deal more directly with the real causes of cardiovascular disease and how diet has a large impact on our cardiovascular health.
That’s just the short list of people I resepct. There are other researchers, plus a number of medical professionals who don’t do their own research, but who are skilled at analysing and reporting the research of others. The lay people who do this are usually iffier, but the citizen scientists Amber O’Hearn and Dave Feldman are well worth paying attention to. The science journalists Nina Teicholz and Gary Taubes have gotten sucked into the world of nutrition science, and they have done yeomen’s work in digging up the scientific research, analysing it, and reporting on it. Their books are well worth reading.