There is now substantial research that suggests that fasting can increase human growth hormone (HGH) up to 1300% in females and 2000% in males. HGH is responsible for the building and maintaining of muscle mass, the burning of fat, and the increase of bone density.

Furthermore, it enhances the immune system, optimizes both mood and well-being, consists of multiple anti-aging abilities, and more.

Dr. Jason Fung, a Canadian nephrologist and world-renowned expert on intermittent fasting, wrote, “When people say that you ‘must’ eat breakfast to have energy for the day, they are completely wrong. Your body has already given you a big shot of the good stuff and fueled you up for the day ahead. You don’t need to stuff your face full of sugary cereals and toast with jam to have energy. This is also the reason why hunger is lowest first thing in the morning (8 am) even though you have not eaten for 12 hours or so.”

What is this “big shot of the good stuff” in which he was referring to? It is human growth hormone!

The body releases a “pulse” of the HGH for a couple of seconds while one sleeps. “This is normal and is meant to get the body ready for the upcoming day by pushing some glucose out of storage and into the blood where it is available for energy.”

Kerndt et al published a study in 1982 that closely followed the life of a patient for a period of time. This patient chose to fast for a 40-day period for religious reasons.

According to the study, during the fast glucose decreased from 96 to 56. Additionally, insulin dropped from 13.5 to 2.91 (about an 80% decrease!) and human growth hormone began at .73 in the patient and reached the astounding amount of 9.86.

“That is a 1,250% increase in growth hormone.”

The study found that a “shorter 5 day fast gives a 300% increase.”

Dr. Fung, in his article, makes the point that fasting results in the “regular secretion throughout the day” of the HGH. The doctor then recognizes a study by Hartman et al that showed a “5 fold increase in HGH in response to a 2 day fast.”



Jones. “How to Boost HGH 1300-2000% Through Intermittent Fasting.” Superhuman Entrepreneur, 17 July 2015,
Fung, MD, Jason. “Fasting and Growth Hormone.” Diet Doctor, 15 December 2017,