Could a nasal spray help you stop gaining weight?

Oxytocin nasal spray may help combat obesity, a new study says

Researchers found that a spray containing the hormone oxytocin may be used to treat obesity, and even to prevent diabetes. In fact oxytocin was found to improve insulin sensitivity, which is the body's ability to clear glucose from the bloodstream. The oxytocin nasal spray reduced caloric intake in healthy men (both normal weight and overweight) with only a single dose, particularly after consumption of fatty foods. Professor Elizabeth Lawson of Harvard Medical School, Boston, said about the finding: "Our results are really exciting. Further study is needed, but I think oxytocin is a promising treatment for obesity and its metabolic complications." Lawson added that oxytocin has sex-specific effects, and it needs to be studied for an extended treatment duration.
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The oxytocin nasal spray is currently approved in Europe, but not in the U.S. (other than in clinical trials.) It is made by Novartis.