referenced articles therein say fasting 48 hours causes a 5-fold increase in HGH, fasting 5 days causes a 10-fold increase, but that 5 days of fasting also makes the cells unable to utilize the extra HGH:
"Despite the fact that fasting may increase your growth hormone, it actually suppresses the anabolic effects of HGH. That’s because fasting lowers the sensitivity of your cells towards HGH, and decreases its main anabolic mediator called Insulin-like growth factor 1 (IGF-1).
Thus you will not experience the benefits of increased HGH on muscle mass, energy levels, etc. ..."
Agreed. One has to cycle the fasting / exercising / rebuilding. Each trainer and nutritionist appear to have their own preferences to maximize this effect but they also have many confounding treatments and are usually already quite healthy.
I would suggest researching this more on the PubMed nih.gov site as they get into a little more details and usually have decent controls in place in some of the studies. Their search function is awful so I suggest using the following on google to get better results:
>" One can fast for 72+ hours to get a massive spike in HGH."<
Relevant URL:
https://hrtguru.com/does-fasting-really-increase-hgh-levels/
referenced articles therein say fasting 48 hours causes a 5-fold increase in HGH, fasting 5 days causes a 10-fold increase, but that 5 days of fasting also makes the cells unable to utilize the extra HGH:
"Despite the fact that fasting may increase your growth hormone, it actually suppresses the anabolic effects of HGH. That’s because fasting lowers the sensitivity of your cells towards HGH, and decreases its main anabolic mediator called Insulin-like growth factor 1 (IGF-1).
Thus you will not experience the benefits of increased HGH on muscle mass, energy levels, etc. ..."