All I know is I lost weight but I was slow. I might do it again to see if I get a different result, my results will not match others and was by no means scientific but I know that with carbs back in my diet "I" an way batter on the bike. Slow to moderate rides was no problem but when it came to long rides or training rides with hard efforts I had nothing in the tank. If all I wanted was to be skinny and didn't care about performance on the bike I would have t up with Keto, I am back to pretty much following Keto but with some more research into Keto and bike riding I have altered it to include carbs during ride and immediately after rides. Yes I gained weight back but that was more to do with my beer consumption which results in junk food consumption. Just for reference my one club does a weekly 15K TT, my first was in full Ketosis and 200.5lbs, my time was 26:08. My second was eating whatever at 220.2lbs and a time of 24:05. Will update how my new experiment goes.