Vesugen

Livagen is a synthetic tetrapeptide (Lys-Glu-Asp-Ala, or KEDA) from the family of short "peptide bioregulators" developed by Vladimir Khavinson's group in St. Petersburg, marketed in connection with liver and immune function. The proposed appeal is epigenetic: it has been reported to loosen tightly packed chromatin in aged cells, supposedly switching age-silenced genes back on. Evidence is limited to small laboratory and cell studies, mostly from one research group, with no clinical trials, so claims should be read with heavy skepticism.

Ovagen is a synthetic ultra-short peptide, marketed as the tripeptide Glu-Asp-Leu (EDL), and grouped with the Khavinson-style "peptide bioregulators" promoted for liver and gastrointestinal support. Like its cousins in that family, it is claimed to act at the gene-expression level in a tissue-specific way. The honest picture: there is very little verifiable scientific data on Ovagen specifically, no clinical trials, and most of what is written about it comes from vendors rather than peer-reviewed research.

Cortagen is a synthetic tetrapeptide (Ala-Glu-Asp-Pro, AEDP) from Vladimir Khavinson's Russian peptide bioregulator program, designed as the defined-sequence stand-in for Cortexin, an older cattle brain cortex extract used in Russian neurology. It is studied mostly for nerve repair, brain function and aging, and it is not approved by the FDA or EMA. Real evidence is limited to animal experiments and Russian-institute work, with no Western randomized human trials.

Chonluten is a synthetic tripeptide (Glu-Asp-Gly, EDG) from the Khavinson bioregulator family, pitched as the lung and bronchial peptide, derived conceptually from the same program that produced Epitalon and Cortagen. It is researched for respiratory tissue and age-related lung decline, and it has no FDA or EMA approval. The evidence is essentially all preclinical or uncontrolled Russian clinical observation, with no randomized human trials.

Crystagen is a synthetic tripeptide (Glu-Asp-Pro, or EDP) from the Khavinson family of short peptide bioregulators, studied as an immune and thymic regulator. It is a research compound, not an approved drug, with no registered human clinical trials. Note: many vendor pages list the wrong sequence; the correct one is Glu-Asp-Pro (EDP).

Prostamax is a synthetic Khavinson tetrapeptide (Lys-Glu-Asp-Pro, KEDP) marketed as a prostate bioregulator, conceived as the defined-sequence successor to the older bovine prostate extracts Prostatilen and Vitaprost. It is studied for prostate inflammation and age-related prostate changes, and it has no FDA or EMA approval. Most of the actual clinical prostate evidence belongs to the parent extract, not to the synthetic KEDP peptide itself.