Epitalon: Reference Overview and Reconstitution Notes

Epitalon is a man-made peptide (a short chain of amino acids) designed to mimic a substance from the pineal gland (a small gland in the brain). It belongs to a group called Khavinson bioregulators, which are studied in anti-aging and longevity research. It is not approved by the FDA and is handled as a research-only compound.

Epitalon

What it is

Epitalon is also written as Epithalon. It is made of four amino acids (the small building blocks that make up proteins) linked in this order: Ala-Glu-Asp-Gly (AEDG). Because it has four amino acids, scientists call it a tetrapeptide (tetra means four). Its molecular weight (a measure of how heavy the molecule is) is about 390 g/mol. It was designed as a shorter version of epithalamin, a longer protein pulled from the pineal gland. It is one of the best-known members of the Khavinson bioregulators, a family of short peptides developed at the St. Petersburg Institute of Bioregulation and Gerontology.

Research context and categorization

Epitalon is mostly grouped under anti-aging and longevity research, and more specifically within the Khavinson peptide bioregulator family. In cell cultures and animal studies, researchers have looked at whether it can switch on telomerase (an enzyme that helps rebuild the tips of chromosomes) and cause telomere elongation (making those tips longer). Think of telomeres like the plastic caps on the ends of shoelaces: they protect chromosomes, and they tend to get shorter as cells age. Epitalon is also studied in relation to the pineal gland's control of melatonin (the sleep-regulating hormone), age-related markers in lab animals, antioxidant activity, and lifespan endpoints in laboratory animals.

These areas of study are still investigational, meaning the effects are not proven. Epitalon is not FDA-approved. Most findings come from lab and animal work, plus long-standing research within the Russian bioregulator program. It is not known whether a telomerase effect seen in a lab dish would work the same way in living human tissue. No controlled human clinical trial has confirmed these outcomes. The descriptions here reflect what the compound is studied in relation to, not confirmed or approved benefits.

Key point: Epitalon is an investigational peptide without FDA approval, and its reported telomere-lengthening effects have not been shown in controlled human clinical trials.

Status

• Regulatory status: Not FDA-approved. Epitalon has no approved use in the United States. It is sold and handled as a research chemical, usually labeled not for human consumption. As of 2026, it was among the peptides removed from the FDA Section 503A compounding category (a list of substances licensed pharmacies can use to make custom preparations) and placed under formal advisory review.
• Sport status: Epitalon is not listed by name on the WADA (World Anti-Doping Agency) Prohibited List. However, because it has no regulatory approval for human therapeutic use, it can fall under the broad S0 Non-Approved Substances category. This covers any pharmacological substance not currently approved by a government health authority. That is a general umbrella rule, not a specific listing for Epitalon.

Reconstitution notes (general)

Concentration means how much peptide is dissolved in a set amount of liquid. To find it, divide the milligrams of peptide in the vial by the millilitres of bacteriostatic water added. For example, a 10 mg vial with 2 mL of bacteriostatic water gives 5 mg/mL. The same vial with only 1 mL gives 10 mg/mL. To work out a target concentration for any vial size, use the peptide calculator.

Dilution and handling notes (compound-specific)

Epitalon arrives as a lyophilized (freeze-dried) powder. Before lab use, it is mixed with bacteriostatic water (water with a small amount of benzyl alcohol added to slow bacterial growth). The common practice is to add about 1 to 2 mL of bacteriostatic water per 10 mg vial. This gives working concentrations in the 5 to 10 mg/mL range. Using less water makes a more concentrated solution with smaller draw volumes. Using more water makes small measurements easier to read on the syringe.

Solubility and Temperature Sensitivity

Epitalon is a short, highly polar (water-attracting) tetrapeptide. Polar molecules mix with water easily, much like sugar dissolving in a glass of water. Because of this, Epitalon is one of the most water-soluble research peptides and usually dissolves almost instantly on contact with water. At the concentrations listed above, it does not normally turn cloudy, gel, or leave undissolved powder behind. This is different from larger or more hydrophobic (water-repelling) peptides, which can stay hazy or leave a solid residue.

The main practical note is temperature. Adding cold water, or working with a vial straight from the fridge, can cause uneven mixing or brief cloudiness. The easy fix is to let both the powder and the water warm up to room temperature before mixing.

Some protocols suggest starting with a small amount of dilute (about 0.6 percent) acetic acid (a mild acid, similar to the acid found in vinegar) to help dissolution before topping up with bacteriostatic water. This is usually not needed because Epitalon dissolves so freely.

Reconstitution Steps

1. Direct the water stream gently down the inner glass wall of the vial, not directly onto the powder.
2. Let the vial stand for a minute or two.
3. Swirl gently if anything remains undissolved.

Do not shake the vial. Shaking causes foam and can stress the peptide. A properly reconstituted vial should look clear and free of floating particles.

Handling and storage

Storage Guidelines

• Keep the reconstituted solution in the fridge at 2 to 8 degrees Celsius (roughly 36 to 46 degrees Fahrenheit) and away from light.
• Wipe the rubber stopper with alcohol before each needle puncture, and write the mix date on the vial label.
• Use the reconstituted vial within a general window of about 4 weeks when kept refrigerated.
• Avoid repeated freeze-thaw cycles. If longer storage is needed, divide the solution into single-use volumes (called aliquots) and freeze those separately.
• Discard any vial that turns cloudy or discolored, or that shows floating particles.

Related reading

• Follistatin
• FOXO4-DRI
• GDF-8 (Myostatin)
• 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 Epitalon and what is its amino acid sequence?

Epitalon (also Epithalon) is a synthetic tetrapeptide with the sequence Ala-Glu-Asp-Gly (AEDG) and a molecular weight of ~390 g/mol, designed to mimic epithalamin, a longer protein derived from the pineal gland.

Is Epitalon FDA-approved, and what is its regulatory status as of 2026?

No. Epitalon has no FDA-approved use, is classified as a research chemical not for human consumption, and as of 2026 was removed from the FDA 503A compounding category and placed under formal advisory review.

What is Epitalon studied for in laboratory and animal research?

It is studied in cell and animal models for telomerase activation, telomere elongation, melatonin regulation, antioxidant activity, and lifespan endpoints. No controlled human clinical trial has confirmed these effects.

What the research community gets wrong about Epitalon handling

Epitalon is one of the easiest research peptides to put into solution, and that reputation leads to a few handling habits that do not hold up. Here are the ones we see most often.

• Thinking it needs acid or a special solvent. Because it is a short, water-loving tetrapeptide (Ala-Glu-Asp-Gly), plain bacteriostatic water is almost always enough. Some protocols reach for dilute acetic acid to force dissolution. With Epitalon that step is usually unnecessary, since it goes into water quickly on its own.
• Treating high solubility as if it means high stability. These are two different properties. A powder that dissolves fast can still change over time once it is in liquid. Epitalon carries oxidation-prone and light-sensitive groups, so an easy mix does not mean the solution lasts forever on the bench.
• Using warm or hot water to speed things up. Room temperature is enough. Heating adds stress with no real benefit. The one temperature note that matters in the other direction is that ice-cold water or a vial straight from the fridge can cause brief cloudiness or uneven mixing, which clears once everything reaches room temperature.
• Shaking the vial. Shaking makes foam and pushes the peptide against air and liquid surfaces, which can stress it. A gentle swirl does the job for a compound that dissolves this readily.
• Leaving the solution out in light and at room temperature. Once reconstituted, keep it cold and away from light, and split it into single-use amounts if it needs to sit for a while, rather than warming and cooling the same vial again and again.

From our bench: the thing that stands out with Epitalon is how little effort reconstitution takes. When we add room-temperature bacteriostatic water down the vial wall and let it sit, the powder usually clears with a light swirl and no leftover residue, which is not the case for every peptide we handle. The one time we saw faint cloudiness, it traced back to water pulled straight from the fridge, and it settled out once the vial warmed to room temperature. We still label the mix date and keep the vial cold and dark, because an easy dissolve tells us nothing about how the solution holds up days later.

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. PubChem, Epitalon (CID 219042), National Library of Medicine , chemical record, molecular formula C14H22N4O9
5. Araj SK, Brzezik J, Mądra-Gackowska K, Szeleszczuk Ł. Overview of Epitalon , Highly Bioactive Pineal Tetrapeptide with Promising Properties. Int J Mol Sci. 2025. PMID 40141333