The medical facts of what is a healthy diet and life style have never been stronger than today. We can measure the relevant inflammation biomarkers and our microbiome and see for ourselves; did my diet and life style change / improve my health or not?
In the old days we were trained by nature to listening better to our bodies, but today the many signals we receive from our body is cancelled out by our industrial high-tech life style and food intake.
Experts in natural medicine find it mind-boggling how we put the label “new” on a range of old diets, e.g. keto diet [ketogenic diet], as the diet has been known for more than half a century if not for 1000s of years and always should be personalized to the individual constitution and situation. The same goes for experts in clinical nutrition, that also for more than a century have had access to an excellent well-controlled human test model: the patients on 100% intravenous or enteral nutrition. From an MD perspective, it’s like none of all this extensive knowledge never reached the general public.