Hormonal
Second-generation obesity management medications (semaglutide and tirzepatide) produce 15-20% body weight loss, significantly exceeding the 5-10% typically achieved by lifestyle interventions alone.
Second-generation obesity medications like semaglutide and tirzepatide are significantly more effective for weight loss than lifestyle changes alone, achieving 15-20% body weight reduction. They work by targeting hormonal pathways that regulate appetite and metabolism, addressing the biological drivers of obesity rather than relying solely on willpower.
In clinical trials the second generation OMMs (i.e., semaglutide and tirzepatide), provided as an adjunct to lifestyle modification, have demonstrated 15–20% reductions in initial bodyweight, on average [29] — results that approach weight losses typically only achieved through bariatric surgery [31].
Why this rating
Based on multiple Phase 3 clinical trials (STEP 1, 3, SURMOUNT 1, 2, 3, 4) cited in the review.
Source
To Reenvision and Redefine: Considering the Role of Lifestyle Interventions in the New Era of Second-Generation Obesity Management Medications
Alexandra Peary et al. · Current Atherosclerosis Reports · 2026
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