Chonluten

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.

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).

Thymalin is not a single peptide but a polypeptide complex extracted from calf thymus, developed in the Soviet and Russian peptide-bioregulator tradition associated with Vladimir Khavinson. It is used in Russia and several post-Soviet countries to correct immune deficiency and is promoted as a geroprotector, with claimed effects on T and B lymphocytes, infection rates and aging. Outside that region it has no FDA or EMA approval, and the strongest human data come from a small number of studies, several from the originating research groups.

Pinealon is a synthetic tripeptide, Glu-Asp-Arg (the EDR peptide), from the Russian peptide-bioregulator family designed to mimic short signaling peptides found in brain tissue. It is studied as a neuroprotective and antioxidant compound, with researchers proposing it protects neurons from oxidative stress and supports cognition. Be clear-eyed about the evidence: it is essentially all cell-culture and animal work from a small set of related labs, with no human clinical trials and no regulatory approval.

Vilon is a synthetic dipeptide, Lys-Glu (lysine-glutamic acid), one of the short peptide bioregulators developed by Vladimir Khavinson's group at the St. Petersburg Institute of Bioregulation and Gerontology in Russia. It is marketed in the anti-aging and immune-support space as a thymus-related bioregulator, but the real evidence base is almost entirely Russian animal studies. There are no registered Western randomized human clinical trials, so any human claims should be read with heavy skepticism.

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.