Peptides: The Most Overhyped Trend in Fitness? Epitalon: What can this peptide do for telomere protection, aging, and longevity, and where is the evidence? Healthspan Injectable peptides are licensed 'for research use only', but that doesn't deter biohackers from selling them or gym goers from conducting their own experiments with unregulated vials ordered from the internet. Peptides Epithalon is a #peptide taken for 20 days, two times a year to improve the #sleep cycle. Our RN, Kathy, swears by it. She says it's the best normal sleep she's had