Who doesn't have a story about working hard to lose weight? Skipping desserts, exercising like a dog, whatever -- only to have that weight sneak back up on you six months later?
Well, the good news is that a chemical called leptin, "a hormone secreted by fat cells may be behind the gain."
"When humans (and rodents) lose 10 percent or more of their body weight, leptin falls rapidly and sets off a cascade of physiological changes that act to put weight back on. Skeletal muscles work more efficiently, thyroid and other hormones are reduced — all so the body burns 15 percent to 20 percent fewer calories, enough to put back 25 pounds or more a year."
Have you ever lost and gained weight? What did you do about it? Did you give it another try?
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