Why use bacteriostatic water instead of plain sterile water?

Bacteriostatic water contains 0.9 % benzyl alcohol, a mild preservative that stops bacteria from growing in the vial after you open it. Plain sterile water has no preservative, so once the stopper is punctured, microbes can enter. BAC water gives a reconstituted peptide vial a much longer safe shelf life — typically four to six weeks when refrigerated.

What is Epitalon being researched for?

Lab studies have explored several directions. Researchers have looked at its ability to activate telomerase and extend telomere length in human cell lines.[3] Other work has examined its antioxidant properties, including protecting oocytes from oxidative damage.[2] A 2025 study also investigated its potential role in wound healing under high-glucose conditions.[5] All findings are preliminary and for research purposes only.

How do I figure out how much BAC water to add?

This depends on the concentration your research protocol requires. The easiest way is to use the calculator on this site. Enter the total milligrams of peptide in the vial and your desired concentration, and it will tell you exactly how many millilitres of BAC water to add. Doing this calculation before you draw up any liquid prevents costly mistakes and wasted material.

Can I shake the vial to mix it faster?

No — shaking is the most common reconstitution mistake. Vigorous shaking introduces air bubbles and mechanical stress that can break peptide bonds, degrading your sample. Always swirl gently instead. If the powder is not dissolving, let the vial sit at room temperature for a few more minutes, then swirl again. Patience here protects the integrity of your peptide.

How to Reconstitute Epitalon: Step-by-Step Guide

What Exactly Is Epitalon?

Epitalon is a tiny synthetic peptide made of just four amino acids: alanine, glutamic acid, aspartic acid, and glycine (often written as AEDG). It was originally modelled on a natural extract from the pineal gland — the pea-sized structure in your brain that helps regulate sleep.^[1]

Researchers have been studying it for roughly 25 years. Recent lab work shows it activates telomerase, an enzyme that can lengthen telomeres (the protective caps on chromosomes that shorten as cells age).^[3] Other studies highlight strong antioxidant activity, including reducing harmful reactive oxygen species in cells.^[2] There is also early research on wound-healing properties in high-glucose cell models.^[5] All of this is preliminary, research-use-only science — but it explains why labs stock the stuff.

When it arrives, Epitalon is a dry white powder sealed in a small glass vial. Before it can be used in research, it needs to be dissolved in a liquid. That process is called reconstitution. Here is how to do it calmly and correctly.

What You Will Need

Your Epitalon vial (lyophilised powder)
Bacteriostatic water (BAC water) — sterile water with 0.9 % benzyl alcohol to keep bacteria out
A 1 ml or 2 ml syringe with a fine needle (27–29 gauge works well)
Alcohol swabs
The calculator on this site to work out your exact volumes

Step 1 — Warm the Vial (2 Minutes)

Take the Epitalon vial out of the fridge and let it sit at room temperature for two minutes. Cold powder can clump and dissolve unevenly. Rolling it gently between your palms for about 30 seconds also helps. There is no heat involved — room temperature is all you need.

Step 2 — Swab Everything

Wipe the rubber stopper on the Epitalon vial with a fresh alcohol swab. Do the same for the stopper on your BAC water vial. Let both air-dry for 15 seconds. This simple step keeps contaminants out.

Step 3 — Draw Your BAC Water

Insert the syringe needle through the centre of the BAC water stopper. Pull the plunger back slowly to draw up the amount of water you need. A common starting point is 1–2 ml, but the exact volume depends on the concentration you want for your research protocol. Use the calculator to find the precise amount before you touch a syringe — it takes the guesswork out completely.

Step 4 — Add the Water Slowly (This Part Matters)

Push the needle through the Epitalon stopper and angle it so the liquid trickles down the side of the vial, not directly onto the powder. Squirting water straight at the powder can damage the peptide structure. Add the BAC water in a slow, steady stream. Be patient — this takes about ten seconds.

Step 5 — Swirl, Do Not Shake

Once the water is in, gently swirl the vial in small circles. Think of swirling a glass of juice, not shaking a cocktail. Shaking creates bubbles and can break the peptide bonds. Swirl for 20–30 seconds until the liquid looks completely clear. If you still see any cloudiness, give it another minute at room temperature and swirl again.

Step 6 — Check Your Concentration with the Calculator

Now open the calculator. Enter the total amount of Epitalon in your vial (in milligrams) and the volume of BAC water you added (in millilitres). The calculator will tell you exactly how many micrograms are in each tick mark on your syringe. Write this number down or screenshot it. Getting the concentration right is the most important number in your whole workflow.

Epitalon has been studied in lab settings at a wide range of concentrations — for example, one oocyte study used 0.1 mM in culture medium.^[2] Always follow the specific protocol for your research application.

Step 7 — Store It Correctly

Label the vial with the date and concentration. Place it in the refrigerator (2–8 °C). Keep it away from direct light. Most reconstituted peptide vials stored this way remain stable for four to six weeks. If you need longer storage, the powder (unreconstituted) can go in the freezer — but once mixed, keep it cold, not frozen.

You Are Done

That is genuinely the whole process. Warm, swab, draw, trickle, swirl, calculate, store. Epitalon is a well-characterised tetrapeptide with a growing body of research behind it — from telomere biology^[3] to antioxidant effects in embryo development^[4] — and giving it a clean, careful reconstitution is the first step toward reliable research results.

Sources

Overview of Epitalon-Highly Bioactive Pineal Tetrapeptide with Promising Properties. — International journal of molecular sciences, 2025. PMID 40141333.
Epitalon protects against post-ovulatory aging-related damage of mouse oocytes in vitro. — Aging, 2022. PMID 35413689.
Epitalon increases telomere length in human cell lines through telomerase upregulation or ALT activity. — Biogerontology, 2025. PMID 40908429.
Epitalon-activated telomerase enhance bovine oocyte maturation rate and post-thawed embryo development. — Life sciences, 2025. PMID 39788414.
The Antioxidant Tetrapeptide Epitalon Enhances Delayed Wound Healing in an in Vitro Model of Diabetic Retinopathy. — Stem cell reviews and reports, 2025. PMID 40493162.
Peptides and Ageing. — Neuro endocrinology letters, 2002. PMID 12374906.

How to Reconstitute Epitalon: A Friendly Step-by-Step Guide