I had a similar experience when I removed sugar and almost all carbs for 5 months. Switched to mostly protein and fat (meat/tuna/eggs/cheese/vegetables) One ma

I had a similar experience when I removed sugar and almost all carbs for 5 months. Switched to mostly protein and fat (meat/tuna/eggs/cheese/vegetables) One major change was much higher "energy"/"alertness levels after lunch and after dinner. No more sleepy low energy "food coma" feeling after meals. Where I would usually feel like laying on the sofa after a long day's work and dinner, now I had the urge to go out on my bicycle, even at night and in winter cold. Although I have to admit that like most people who do drastic diet changes I had a relapse and went back to eating sugar again after the five months. This relapse happened gradually, where I naively convinced myself that I was no longer addicted to sugar, and started by having a treat once a week, which quickly became once a day ... The mental change is still ingrained in me though, I now treat sugar like a dangerous addictive substance and I'm trying to get rid of it like any other "substance abuser".