I accidentally did intermittent fasting as a teenager for years. I just didn't have breakfast, had lunch and dinner and oddly enough it matched the requirements

I accidentally did intermittent fasting as a teenager for years. I just didn't have breakfast, had lunch and dinner and oddly enough it matched the requirements to be considered IF. One day I got interested in IF, looked up the rules and found out I was already on it. I can't say whether it did anything but it definitely made it hard to consume enough calories, so despite training a lot and despite eating a lot at lunch and dinner, I've always been skinny. I assume IF could be a good choice for someone who's overweight and barely training or not training at all. I was training bodyweight and gymnastic at the time, making significant progress in terms of strength - despite that, I saw very little muscle building. I suppose being that lean lowered my testosterone production resulting in little gains. I had the brilliant idea of even trying going vegetarian, vegan for a while, shifting to a source of proteins which is not as complete and not as well absorbed as proteins coming from animal sources. After 20 years of reading on the subject and looking at what studies are saying nowadays, if I could go back through my teenage years I would eat close to paleo, 6 times per day and lift weights.