I always respect your opinion but have to disagree on this one. I do fasting every now and then, no food just water (2-3 days) and my energy is through the roof. It actually is so high (the energy) that I can't even sleep or feel sleepy at all, and that is usually the reason I have to end the fast early, usually 2-3 days max (ideally would like to 6-7 days twice per year). So, I'm pretty sure there is other things at play that makes us feel tired on these fat lowering drugs but not qualified to give the proper answer.
However, I wonder if anyone has tried HGH while on GLP1's?
I'm having great success with HGH for muscle building/maintaining and energy but actually I stopped Reta and Tirze (before my HGH regimen) because Reta and Tirze gave me excruciating/crippling back pain. I was able to reduce the back pain almost to zero with 3mg's of LDN (Low dose Naltrexone) daily, but I am still not 100% pain free to start Reta and/or Tirze again.