As weight-loss drug users turn to dietary supplements, doctors, regulators raise flags
Allison Vecchio, 42, turned to dietary supplements after experiencing side effects from GLP-1 weight-loss drugs. With 10 million Americans using these drugs last year, supplement sales surged past $74 billion in 2025. As their popularity grows, doctors and regulators are raising concerns about the lack of oversight and scientific credibility in the supplement market.