In a group of adults with obesity who were given the medication semaglutide, 64% lost at least 10% of their body weight and 41% lost at least 15% after one year of treatment.
Mechanism
Synthesis from 1 study
Semaglutide helps people lose weight by making them feel full sooner and keeping food in their stomach longer, so they eat less. This matches what we know about how the drug works, but the study didn’t measure those exact body changes — so we’re confident based on other science, but not 100%...
Most probable mechanism
Semaglutide tricks the body into feeling full faster and for longer by mimicking a natural hormone that tells the brain when to stop eating. It also slows down how fast food leaves the stomach, so people feel full longer and eat less.
Semaglutide binds to and activates glucagon-like peptide-1 (GLP-1) receptors in the hypothalamus and brainstem
Activation of GLP-1 receptors reduces hunger signals and increases satiety signals in the central nervous system
Semaglutide slows gastric emptying, prolonging the sensation of fullness after meals
Reduced food intake leads to a sustained negative energy balance, resulting in weight loss
Evidence from Studies
Supporting (1)
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Weight loss and cardiovascular disease risk outcomes of semaglutide: a one-year multicentered study
Contradicting (0)
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Gold Standard Evidence Needed
According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.