Livagen is the "liver" name on most bioregulator lists. It gets talked about as a liver and anti-aging peptide, but the research behind it is small and mostly done in a dish. Here's the simple version. WHAT IT IS Livagen is a short lab-made peptide of four amino acids: lysine, glutamic acid, aspartic acid, and alanine (written Lys-Glu-Asp-Ala, or KEDA). It comes from the Khavinson bioregulator program in St. Petersburg, Russia, the same group behind Epitalon, Cortagen, and Cardiogen. It was designed as a small synthetic version of the idea behind a liver extract from calves that the same group studied. WHAT PEOPLE USE IT FOR • Liver support ideas in the longevity community • "Aging cells" and gene-activity conversations • Stacking talk with other Khavinson bioregulators WHAT THE RESEARCH ACTUALLY SHOWS • Human cells in a dish: the best-known study (Khavinson et al., 2002) took white blood cells from older people and exposed them to Livagen in the lab. The authors reported that tightly packed "switched off" parts of the DNA loosened up and some genes became more active. They read that as reversing an age-related change in the cells. • Animal tissue: rat liver and other tissue samples grown in a dish responded to Livagen in a way the authors called tissue-specific. • Animal liver models: a 2020 review from the same group describes Livagen helping liver function and immune markers in animals with induced liver damage. • Humans: there is no published, controlled human trial of Livagen taken as a treatment, and nothing is registered on ClinicalTrials.gov. Evidence level: Very Early. Cell and animal studies, nearly all from one research lineage, with no independent replication and no human outcome data. COMMON QUESTIONS Is Livagen a liver medication? No. It is not approved in the US for any liver condition, and it has not been tested against real liver disease in people. Is it the same as Epitalon? No. They look similar on paper but the amino acids are different: Epitalon is AEDG and Livagen is KEDA.

Cardiogen is the "heart" name on most bioregulator lists. It sounds like a heart medicine, but the evidence behind it is much smaller than the name suggests. Here's the simple version. WHAT IT IS Cardiogen is a short lab-made peptide of four amino acids: alanine, glutamic acid, aspartic acid, and arginine (written Ala-Glu-Asp-Arg, or AEDR). It comes from the Khavinson bioregulator program in St. Petersburg, Russia, the same research group behind Epitalon, Pinealon, and Cortagen. The idea in that program is that tiny tissue-specific peptides can nudge gene activity in the organ they are named after. For Cardiogen, that organ is the heart. WHAT PEOPLE USE IT FOR • Heart and blood-vessel support ideas in the longevity community • "Aging heart" conversations, especially alongside other bioregulators • Stacking talk with other Khavinson peptides WHAT THE RESEARCH ACTUALLY SHOWS • Tissue culture: the clearest study (Chalisova et al., 2009) took small pieces of heart tissue from young and old rats and grew them in a dish. Cardiogen increased cell growth in both and lowered p53, a protein tied to cell self-destruction. The authors read that as less cell death. • Other lab work: a few more papers, including one on heart fibroblasts (the cells that make scar tissue), come from the same research group. • Humans: there is no published, controlled human trial of Cardiogen, and nothing is registered on ClinicalTrials.gov. Claims you may see online about heart scans improving in older patients do not trace back to a study you can check. Evidence level: Very Early. A handful of cell and tissue studies from one research lineage, with no independent replication and no human outcome data. COMMON QUESTIONS Is Cardiogen a heart medication? No. It is not approved anywhere in the US for any heart condition, and it has not been tested against real heart disease in people. Is it the same as Epitalon or Cortagen? No. They are close cousins with different last amino acids: Epitalon is AEDG, Cortagen is AEDP, and Cardiogen is AEDR.

🧬 CORTAGEN: WHAT IS IT? Cortagen shows up in bioregulator lists next to words like "brain" and "cortex." It is not the same thing as Cortexin (the older tissue extract), and it is not Epitalon either. Here's the simple version. WHAT IT IS Cortagen is a short lab-made peptide of four amino acids: alanine, glutamic acid, aspartic acid, and proline (written Ala-Glu-Asp-Pro, or AEDP). Researchers in the Khavinson bioregulator program designed it from the amino-acid pattern of Cortexin, a peptide preparation from the cerebral cortex (the outer layer of the brain). So the name points at brain cortex — not the adrenal cortex. WHAT PEOPLE USE IT FOR • Brain and nerve support ideas (memory, focus, recovery after nerve stress) • Aging-related brain conversations in the longevity community • Comparisons with older cortex extracts like Cortexin WHAT THE RESEARCH ACTUALLY SHOWS • Cells: reports of changes in gene activity and how tightly DNA is packed (chromatin) in cultured cells, including white blood cells from older adults.• Animals: a rat study reported faster sciatic-nerve fiber growth after injury; mouse work looked at gene expression in heart tissue and at behavior (locomotion / anxiety-style tests). Some ischemia (low blood-flow) models compared Cortexin and Cortagen. • Humans: there is no clear, controlled clinical trial of Cortagen itself indexed in the major databases. Some program writing mentions human use, but that is not the same as a published, replicated trial you can independently check. Cortexin's clinical history does not automatically transfer to this single synthetic peptide. Evidence level: Very Early. Real preclinical papers exist, mostly from one research lineage, with little independent Western replication and almost no firm human outcome data for Cortagen alone. COMMON QUESTIONS Is Cortagen the same as Cortexin? No. Cortexin is a mixed peptide extract from brain cortex tissue. Cortagen is one defined four-amino-acid sequence designed from that extract's chemistry.

Thymalin shows up a lot in bioregulator conversations next to words like "immune" and "thymus." It is not the same thing as Thymosin Alpha-1 or the short synthetic peptides that came later. Here's the simple version. WHAT IT IS Thymalin is a peptide complex taken from calf thymus tissue (the thymus is a gland that helps train immune cells). A research group in Russia developed it decades ago as an immune-support medicine. Unlike a single lab-made sequence such as Epitalon, Thymalin is a mixture of thymus peptides. Researchers later linked some of its activity to short pieces inside that mixture, including KE, EW, and EDP. WHAT PEOPLE USE IT FOR • Immune support, especially in older adults • Recovery when immune markers look "run down" • Aging-related immune decline (sometimes called immunosenescence) WHAT THE RESEARCH ACTUALLY SHOWS • Cells: studies report effects on immune-cell differentiation and gene activity tied to those short peptides. • Animals: immune and aging models from the same research tradition. • Humans: there are real clinical papers, mostly from the originating research groups. Older long-term studies in elderly people reported fewer respiratory illnesses and lower mortality versus controls. A 2021 study in older patients with severe COVID-19 reported faster recovery of some immune markers and lower hospital mortality when Thymalin was added to standard care. Large, independent, multi-country replications are still limited. Evidence level: Early. More human reports than many bioregulators, but much of the work comes from the same research circle and needs broader confirmation. COMMON QUESTIONS Is Thymalin the same as Thymosin Alpha-1? No. Thymosin Alpha-1 is one defined 28-amino-acid peptide (sold as Zadaxin in some countries). Thymalin is a thymus tissue extract / peptide complex. Is it the same as Thymogen? No. Thymogen is usually the defined dipeptide EW. Thymalin is the broader extract that may contain EW among other pieces. Does it "boost" the immune system for healthy young people? That is not what the better-studied use cases focus on. Most published human work is in older adults or people with clear immune stress.

🧬 PINEALON: WHAT IS IT? Pinealon often gets mixed up with Epitalon because both names point to the pineal gland. They're different compounds. Here's the simple version. WHAT IT IS Pinealon is a very short, lab-made peptide, just 3 amino acids long. It comes from the same Russian research group behind many other bioregulators. Despite the "pineal" in its name, most of its research focuses on the brain and nervous system in general. WHAT PEOPLE USE IT FOR • Brain health and memory as they age • Sleep • Protecting brain cells from stress WHAT THE RESEARCH ACTUALLY SHOWS • Cells: studies suggest it may help brain cells handle oxidative stress (a type of cell damage). Researchers propose that it's small enough to get inside cells and affect which genes are switched on. • Animals: some rodent studies reported protective effects on brain cells under stress, such as low oxygen. • Humans: very limited. There are only a few small reports, mostly from the same research group. Evidence level: Very Early. Mostly cell and animal research. COMMON QUESTIONS Is Pinealon the same as Epitalon? No. Epitalon has 4 amino acids and is tied to pineal and longevity research. Pinealon has 3 amino acids and is studied more for general brain protection. Does it help with sleep? That's a common online claim, but good human studies on sleep are missing. Why is it sold as a capsule? Many bioregulators are sold as oral capsules. How well such a short peptide survives digestion and reaches the brain in people hasn't been clearly shown. Is it safe? It hasn't been studied enough in people to say much about long-term safety. EASY WAY TO REMEMBER IT Pinealon = a 3-amino-acid bioregulator studied mostly in cells and animals for brain protection. BOTTOM LINE Pinealon is an early-stage research compound. The brain and sleep claims around it are well ahead of the human evidence. We'll keep breaking these down one name at a time in plain English.