To give another N=1, I don’t feel good on a 16:8 split. At least not when the eating window starts at noon. Long term (18 months) this zapped my energy and I lost a lot of muscle. Yes, weight loss was phenomenal, but I gained all of that back in the phase of exhaustion that followed.

What has worked better for me was longer fasts, eg 48h, max once per week. And lately I‘ve been experimenting with skipping late dinner (no food after 6PM) which is kinda hard but seems to work for improved sleep and digestive health. I usually have visible bags under my eyes, those tend to be greatly reduced when I eat an early or no dinner.