regeneron glp-1 gip treatment muscle loss side effects Emerging Role of Myostatin Inhibitors in the Management of Glucagon-Like Peptide-1-Associated Sarcopenia and Metabolic Disorders Targeting GLP-1, GIP & GCG

For weight loss, diabetes, or some other reason

Last reviewed: July 3, 2026 Last updated: July 3, 2026 Written by: Jay Hastings, CEO of PlexusDx Jay Hastings is the CEO of PlexusDx, a precision health company focused on genetic testing, blood biomarker insights, and personalized wellness recommendations

Always review the dosing instructions included with your medication and consult your doctor with any questions

This interview has been edited and condensed for clarity .

The warning exists because, during early laboratory trials, GLP-1 medications were found to cause a rare type of thyroid cancer (Medullary Thyroid Cancer) in rats

Human data : No clear causal link yet, but long-term monitoring is ongoing