Pancragen: Reference Overview and Reconstitution Notes

Pancragen is a man-made short-chain peptide (a very small protein-like molecule) from the Khavinson bioregulator family. It is grouped with compounds studied in metabolism and hormone research. It is a research-only compound and is not approved by the FDA.

Pancragen

What it is

Pancragen is a man-made, short-chain peptide. A peptide is a small, protein-like molecule built from a chain of amino acids (the building blocks that make up proteins). Pancragen has just four amino acids in its chain, which makes it a tetrapeptide (the prefix "tetra" simply means four). Its four building blocks, in order, are lysine, glutamic acid, aspartic acid, and tryptophan (Lys-Glu-Asp-Trp, or KEDW). Its molecular weight is about 576 g/mol (grams per mole, a standard unit scientists use to measure how heavy a molecule is). Pancragen belongs to the Khavinson peptide bioregulator family, a set of short peptides developed at the Saint Petersburg Institute of Bioregulation and Gerontology. Each peptide in this family is linked to a specific type of tissue.

Key point: Pancragen is an investigational (still being studied) man-made peptide in the Khavinson bioregulator family. It is studied mainly for its possible connection to pancreatic tissue.

Research context and categorization

Pancreatic Research Focus

Pancragen is grouped as a Khavinson bioregulator with a focus on metabolism (how the body processes energy) and the endocrine system (the network of glands that produce hormones). Researchers connect it to pancreatic tissue. In particular, studies look at the endocrine pancreas (the part of the pancreas that makes hormones) and the islets of Langerhans (small clusters of hormone-making cells scattered through the pancreas, think of them as tiny islands of specialized cells inside the organ). Research in cell cultures and laboratory models has explored this peptide in relation to insulin-linked gene activity and the formation of beta cells (the cells responsible for producing insulin).

Published work from the group that created Pancragen has examined whether the peptide is connected to changes in how pancreatic cells develop and send signals to each other.

Investigational Status

These uses are still being investigated. Pancragen is not an approved therapy. Most published research comes from the institute that developed it, and independent studies by outside researchers are still limited.

Any effects described in that research should be treated as unconfirmed observations, not established or approved benefits.

Status

• Regulatory status: Research-only, not FDA-approved. Pancragen has no approved human indication in the United States and is handled as a research chemical. Some sources note a separate registration in Russia, but that does not mean the FDA has approved it.
• Sport status: Not specifically listed on the WADA Prohibited List. WADA is the World Anti-Doping Agency, the international body that sets anti-doping rules for sport. Short Khavinson bioregulator peptides such as KEDW are not named on the current list, and they are not growth-hormone secretagogues (compounds that trigger the release of growth hormone) or growth factors of the type covered under the S2 peptide hormones and growth factors category. Because WADA also uses broad catch-all language and updates its list every year, anyone in a tested sport should confirm current status directly with WADA or their anti-doping authority.

Reconstitution notes (general)

Reconstitution means dissolving a dry powder in liquid so it can be used in the lab. Concentration equals the milligrams of peptide in the vial divided by the millilitres of bacteriostatic water added. Bacteriostatic water is sterile water with a small amount of preservative that slows bacterial growth inside the vial. For example, a 20 mg vial reconstituted with 2 mL of bacteriostatic water gives 10 mg/mL. To plan a target concentration, use the calculator at peptide calculator.

Dilution and handling notes (compound-specific)

Pancragen ships as a lyophilized (freeze-dried) powder and is mixed with bacteriostatic water before use in the lab. Vials are commonly sold in 10 mg, 20 mg, and 50 mg sizes. The amount of water added depends on the vial size and the concentration needed for the work at hand. A typical range is roughly 1 to 2 mL. Adding more water simply gives a lower, easier-to-measure concentration.

Pancragen is a small peptide that dissolves easily in water. It forms a clear solution and is less likely to gel, cloud, or clump than larger or more water-repelling peptides. Good lab practice still applies: add the water slowly by aiming the stream down the inside wall of the vial instead of directly onto the powder, then gently swirl or roll the vial to mix.

Reconstitution Steps and Light Sensitivity

The peptide should fully dissolve, usually within a minute or two. Do not shake the vial hard. Vigorous shaking can cause foaming and may stress the peptide with no benefit. One thing to know about Pancragen specifically: it contains a tryptophan (Trp) building block at the end of its chain. Tryptophan has a part of its structure that is light-sensitive, so keep the vial away from bright or direct light during and after mixing (much like you would protect a photograph from fading in sunlight). If any haze, particles, or floating bits remain after gentle swirling, the solution should not be considered clear.

Handling and storage

• Store the freeze-dried powder cold. Keep the reconstituted (mixed) solution in the refrigerator at 2 to 8 C and away from direct light.
• Wipe the stopper with an alcohol swab before drawing from the vial. Label the vial with the date it was mixed.
• Treat a refrigerated, reconstituted vial as usable for roughly a 4-week window.
• Discard the solution if it turns cloudy or discolored, or if particles or floating bits appear.

Related reading

• PE-22-28
• PEG-MGF
• Pinealon
• How Reconstitution Works
• How Long Does a Reconstituted Vial Last?

Tools and supplies

• peptide calculator
• Bacteriostatic Water 30 ml
• Gansulin Metal Reusable Pen
• 3 ml Glass Cartridges (10-pack)
• Complete Starter Kit

Reminder: research and educational reference only. Preppin Peppers sells hardware and materials, not peptides. Not medical, dosing, or health advice, not evaluated by the FDA, and not intended for human or animal use.

Frequently asked questions

What is the amino acid sequence and molecular weight of Pancragen?

Pancragen is a tetrapeptide with the sequence Lys-Glu-Asp-Trp (KEDW) and a molecular weight of approximately 576 g/mol. It belongs to the Khavinson short-chain bioregulator peptide family.

Is Pancragen listed on the WADA Prohibited List?

Pancragen (KEDW) is not specifically named on the current WADA Prohibited List and is not classified as a growth-hormone secretagogue or S2-category growth factor. Athletes in tested sports should confirm current status directly with WADA each year.

What tissue or biological system is Pancragen associated with in research?

Research associates Pancragen with pancreatic tissue, specifically the endocrine pancreas and islets of Langerhans. Laboratory studies have examined insulin-linked gene activity and beta-cell formation; all findings remain investigational and unconfirmed.

What the research community gets wrong about Pancragen

• Treating cell-culture findings as settled facts. Most published work on Pancragen (KEDW) comes from one research group and uses cell cultures and lab models. Those results are early observations about gene activity in pancreatic cells, not confirmed outcomes. Read them as leads for more study, not as proven effects.
• Assuming a registration abroad equals FDA approval. Some sources note a separate registration in Russia. That is not the same as FDA approval. In the United States, KEDW is handled as a research-only material with no approved human use.
• Thinking a small peptide needs no special care with light. KEDW ends in a tryptophan (Trp) building block, and part of tryptophan's structure reacts to light. So even though the molecule is small and dissolves fast, the vial still needs protection from bright or direct light during and after mixing.
• Treating all Khavinson peptides as interchangeable. KEDW is one specific four-letter sequence. Lab studies report that different short peptides in this family line up with different DNA sequences, so swapping one for another in a protocol is not a fair substitution.
• Overcomplicating the mixing step. KEDW goes into solution easily and forms a clear liquid. It does not need heat, sonication, or a cosolvent to dissolve. Adding those steps only adds risk (foaming, stress on the peptide) with no gain.

From our bench: Working with a Pancragen vial? We want your real numbers. Time how long the powder takes to fully clear after you add bacteriostatic water down the vial wall and swirl gently, and note the vial size and volume you used. Also tell us how you shielded it from light and whether the solution stayed clear through the refrigerated window. Send your own measured times and observations (no guesses), and we will fold anonymized bench notes into this page.

Sources

1. Bacteriostatic Water for Injection, USP , FDA/DailyMed label (0.9% benzyl alcohol)
2. Duerkop et al., Biotechnol J 2018 , Impact of Cavitation, High Shear Stress and Air/Liquid Interfaces on Protein Aggregation
3. Sigma-Aldrich (Merck) , Handling and Storage Guidelines for Peptides and Proteins
4. Khavinson V, Linkova N, Diatlova A, Trofimova S. Peptide Regulation of Cell Differentiation. Stem Cell Rev Rep. 2020. PMID 31808038
5. Ashapkin VV, Linkova NS, Khavinson VKh, Vanyushin BF. Epigenetic mechanisms of peptidergic regulation of gene expression during aging of human cells. Biochemistry (Mosc). 2015. PMID 25761685
6. Khavinson VKh, Lin'kova NS, Tarnovskaya SI. Short Peptides Regulate Gene Expression. Bull Exp Biol Med. 2016. PMID 27909961