Stephen Heymsfield
Physician and body composition researcher at the Pennington Biomedical Research Center, lead author on the BELIEVE trial and author of hundreds of peer-reviewed articles on body composition and metabolism.
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Mar 23, 2026 • 39min
Bimagrumab and Semaglutide: The BELIEVE Trial Results With Dr. Steven Heymsfield
Dr. Stephen Heymsfield, physician and body composition researcher at Pennington Biomedical, led the BELIEVE trial. He explains bimagrumab’s activin receptor blockade, why combining it with semaglutide preserves muscle while targeting fat, and how the trial showed over 90% of combination weight loss was fat. They also discuss LDL changes, visceral fat disappearance, functional testing, and future drug development.
