We can't point to a single paper and say, "Here's the definitive proof." Anyone who tells you otherwise isn't being truthful
Liposomal BPC-157+KPV Quicksilver Scientific Liposomal BPC-157 + KPV is an oral, multi-purpose, high absorption peptide formulation of BPC-157, a 15 amino acid derivative of the BPC protein naturally found in the human digestive tract, and KPV, a naturally occurring tripeptide composed of lysine, proline, and valine
[1] Gray-Market Risks: Commenters on research and nootropic forums emphasize that buying unverified, research-grade peptides or compounds online carries inherent purity and safety risks, as independent verification is often difficult or absent
Dixit V, Chaubey KK, Dayal D, Chole PB, Manjunath BT, Bachheti RK, Gupta PC, Bachheti A, Worku LA (2025) Natural products in aging: cellular mechanisms and emerging therapeutics for age-related disorders