I think Paul A. Johnson is correct. Here is a study showing a rather large increase in HGH in men (for women it is a bit more controversial) while intermittent fasting. read more
The levels of HGH or human growth hormone skyrocket, increasing as much as 5 times during intermittent fasting. This benefits muscle growth and fat loss. I used intermittent fasting as part of my routine and lost 38 lbs and 16% body fat over 90 days. read more
The physiology of fasting is fascinating. The power of fasting lies not in the mere reduction of calories, but the beneficial hormonal changes. One of the main benefits comes from reducing insulin, but there are also increases in nor-adrenalin, cortisol, and growth hormone. read more