Stanford scientists identified a naturally occurring molecule that suppressed appetite and promoted fat loss in animals. But the most intriguing finding wasn’t simply how much weight the animals lost. They appeared to lose fat while largely preserving muscle.

The molecule, called BRP, is attracting renewed attention following a ScienceDaily report . Unlike Ozempic, which affects receptors throughout the body, BRP appears to act more selectively on brain circuits regulating hunger. The findings are promising, although the research was originally published in 2025 and hasn’t established benefits in humans.

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Stanford’s Weight-Loss Molecule Targets a Different Pathway

Researchers used artificial intelligence to identify BRP, a peptide consisting of just 12 amino acids.…