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Does fasting cause muscle loss? No, notes Jason Fung, MD
Wednesday, May 16, 2018 11:39 am Email this article
Does fasting to lose weight causes you to lose muscle?
No, it does not according to a new book called The Complete Guide to Fasting: Heal Your Body Through Intermittent, Alternate-Day, and Extended Fasting by Jason Fung, MD and Jimmie Moore.
“Alternate-day fasting over seventy days decreased body weight by 6 percent, but fat mass decreased by 11.4 percent and lean mass (muscle and bone) did not change at all,” Dr. Fung writes.
“The normal protein breakdown of around seventy-five  grams per day falls to fifteen to twenty [15-20] grams per day during fasting.
“Rather than burning muscle during fasting, we start conserving muscle.
“Much of the amino acids that are broken down during regular turnover of cells are reabsorbed into new proteins.”
“After all, why would your body store excess energy as fat if it meant to burn protein as soon as the chips were down?
“Muscles and other proteins are functional tissues and have many purposes.
“They are not designed to store energy. Glycogen and fat are.
“To burn muscle for energy would be like storing firewood and then, as soon as cold weather hits, chopping up your sofa and throwing it into the fire.
“In fact, fasting is one of the most potent stimuli for growth hormone secretion, and increased growth hormone helps maintain lean body mass.
“In studies that used drugs to suppress growth hormone in fasted subjects, there was a 50 percent increase in protein oxidation.”
Interview with Dr. Fung About Fasting
Watch the very interesting interview of Dr. Jason Fung in which he talks about the health benefits and weight loss benefits of fasting.
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