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A large-scale genome-wide association study published in Nature in April 2026, conducted by 23andMe researchers using data from 27,885 GLP-1 medication users, identified a specific variant in the GLP1R gene the gene that encodes the primary receptor these drugs target associated with differential weight loss efficacy

both hypokalemia (low potassium) and hyperkalemia (high potassium) can trigger dangerous heart rhythm disturbances

Participants took part in a programme using a gradual calorie reduction or a very low-calorie diet

Wegovy (Semaglutide Injection) As the weight loss counterpart of Ozempic, Wegovy administers semaglutide via a once-weekly injection

An excluded medication has no coverage pathway through standard pharmacy benefits, though appeal processes and formulary exceptions may still be available in limited circumstances

Metabolism : Some people naturally burn through supplements faster or more efficiently than others