Drug Absorption and Bioavailability Basicmedical Key Epitalon: What can this peptide do for telomere protection, aging, and longevity, and where is the evidence? Healthspan PDF) Overview of EpitalonHighly Bioactive Pineal Tetrapeptide with Promising Properties Your body already produces thousands of peptides biological signalling molecules that instruct cells to repair tissue, produce hormones, regulate immunity, and protect neurons. The question longevity medicine is now asking is: