Dieting

There's certainly medical evidence that limiting your "eating window" improves weight loss. Your metabolism basically has two modes: digestion and repair. It can't do both at once, because digestion requires a lot of enzymes and stuff, so the longer you can go between meals, the more time it can spend doing cleanup and maintenance. That includes turning to fat reserves for energy once you've burned up your meal. I couldn't manage OMAD myself, but I try to postpone breakfast until I'm genuinely hungry, and eat dinner at least a couple of hours before bedtime.

Personally I'm not keen on the whole keto/paleo/low-carb thing - sure it works in the short-term, but all that saturated fat is really bad for the arteries in the long term. Doctors who recommend WFPB (whole food plant-based) eating plans have been able to reverse coronary heart disease, atherosclerosis and type 2 diabetes in their patients, which is not to be sniffed at!

Plus, regardless of what we "evolved" to eat, remember that evolution is basically finished with you by the time you're forty, because you (or at least your ancestors) will have raised the next generation by then and passed your genes on to them. A diet designed for fast reproduction is not necessarily going to help you live a long and active old age