Epithalon

Ten publications are cited, from 2002 to 2025. Eight are preclinical: human cell lines, an in vitro model of diabetic retinopathy, bovine and mouse oocytes, human and oral stem cells, and two rat studies, one recording neocortical neuron activity and one measuring intestinal enzymes in old animals. One is a 2025 narrative review, and one is a 2002 clinical report in patients with retinitis pigmentosa.

In human cell lines, a 2025 study reported longer telomeres, through increased hTERT expression and telomerase activity in normal cells and through ALT activity chiefly in cancer cells. In bovine oocytes, epitalon was associated with higher maturation rates and better post-thaw embryo development; in mouse oocytes ageing in culture, it reduced spindle defects and apoptosis and raised mitochondrial membrane potential. In human stem cells, AEDG increased expression of neuronal differentiation genes, possibly through histone binding, and in long-term oral stem cell culture, AEDG and a second peptide, KED, delayed senescence markers. In the diabetic retinopathy model it was reported to speed the closure of delayed wounds in culture. In rats, it raised neocortical firing, both in active neurons and by recruiting silent ones, and in old rats a month of epitalon raised the activity of two intestinal membrane enzymes, maltase and alkaline phosphatase. The 2002 clinical report, in patients with retinitis pigmentosa, reported an improvement in retinal condition; its entry gives no detail of design, size or controls.

The evidence is almost entirely preclinical, and most of it comes from cell and oocyte culture, which cannot show what happens in a whole organism. The single clinical report dates from 2002, and no later human study appears among the citations. The rat studies are from 2002 and 2007, and the intestinal study tested epithalon alongside a second peptide, Vilon, and measured only gut enzyme activity. The retinopathy authors asked for more mechanistic and safety work, and the 2025 review notes that physico-chemical and structural studies of the peptide remain limited.