Peptides are tiny messengers that cells use to send signals, telling the body...

https://yourhealthmagazine.net/article/health-news-research/how-peptides-help-scientists-understand-cell-communication/

Peptides are tiny messengers that cells use to send signals, telling the body how to respond to different conditions. Researchers study peptides to understand how they bind to specific receptors and trigger signaling pathways inside cells