Hmmm. I did it on the advice of my doctor, and lost 83 pounds, and have kept the weight off. Lowered my sugar from a pre-diabetic level to a very healthy level, and my energy and stamina are better in my mid fifties than they were in my thirties. I'm not arguing with you...but the fad, con, and unhealthy diet may have added years to my life, and took 83 pounds off - apparently my mileage varied from your message. My day job has me in a medical clinic that does pretty well for a hometown clinic - and my PCP works where I do. My experiences have been very positive with a keto lifestyle.