The primary concern is diminished therapeutic effect rather than increased toxicity
Nutritional intake: Significant appetite suppression associated with GLP-1 therapies can lead to reduced overall dietary intake
Long-term, unmonitored use might also lead to lowered zinc levels
2 NICE guidance for semaglutide also specifies that pharmacotherapy should be provided alongside a reduced-calorie diet and increased physical activity, with specialist multidisciplinary input where appropriate
The SURMOUNT-1 trial evaluating tirzepatide demonstrated substantial results, with participants achieving mean weight reductions of approximately 15% (5 mg), 19.5% (10 mg), and 20.9% (15 mg) over 72 weeks
MedicalDaily Evidence Check Study type: Phase 3 randomized controlled trial (ATTAIN program) Participants: Adults with obesity or overweight with at least one weight-related comorbidity Approval date: April 1, 2026 What it found: Average weight loss of approximately 12.4% (about 27 lbs) at highest dose over 72 weeks What it did not prove: That it matches injectable GLP-1 efficacy