you can find a lot of research claiming that but the testing done is short term. 2-3 weeks, and it will take the body 3 to 10 weeks to normalize/adapt again to a keto diet. so at first it will go down then come back. why these studies are flawed like this? I dont know. I personally achieved my best composition at age 43. was no mistake test was at a very good level. as a male you can always tell:). I also experimented with a low fat diet in my younger years and became a soft, smaller version of my self. I do wish Ali would do a long term study (12 weeks) that would be a minimum for high fat diet.