How to handle, reconstitute and store research peptides.

What research peptides are

Peptides are short chains of amino acids, the same building blocks that make up proteins, usually between 2 and 50 units long. Many occur naturally in the body as signalling molecules; others are synthetic versions or modified analogues designed to be more stable.

In the lab, research peptides are used as reagents: reference standards for analysis, probes for studying how a receptor responds, and tools for exploring signalling pathways in cell and tissue models. They are supplied as a freeze-dried (lyophilised) powder because that form stays stable far longer than a liquid.

How peptides are studied

Published research tends to group peptides by the receptor or pathway they act on, rather than by the effect they are associated with. The main families you'll see in the literature:

• Incretin and metabolic peptides act on GLP-1, GIP, glucagon or amylin receptors and are studied in glucose regulation and energy balance.
• Growth hormone secretagogues act on the GHRH receptor or the ghrelin receptor to study pituitary signalling.
• Melanocortin agonists act on the MC1R to MC4R receptors and are studied in pigmentation and neuro-signalling.
• Regenerative peptides are studied in tissue, wound and cell-migration models, mostly at the pre-clinical stage.
• Cofactors and longevity compounds such as NAD+ are studied in cell energy and ageing research.

Research areas we cover

Reconstitution in the lab

Lyophilised peptides are dissolved in a sterile diluent before laboratory use. Bacteriostatic (BAC) water, which contains 0.9% benzyl alcohol to slow bacterial growth, is the usual choice. Every vial order includes BAC water and a reconstitution card.

1. Prepare. Let the vial reach room temperature. Wipe the rubber stoppers of both the peptide vial and the BAC water with an alcohol wipe.
2. Draw the diluent. Using a fresh sterile syringe, draw up the volume of BAC water you've chosen.
3. Add it slowly. Insert the needle and let the water run down the inside wall of the vial, not straight onto the powder.
4. Dissolve gently. Swirl or roll the vial between your fingers until the liquid is clear. Don't shake it hard, which can damage the peptide.
5. Label and refrigerate. Write the date and concentration on the vial and store it at 2–8°C.

Concentration calculations

The concentration of a reconstituted vial is the amount of peptide divided by the volume of diluent you added:

Concentration (mg/ml) = peptide (mg) ÷ diluent (ml)

To convert to micrograms, multiply by 1,000. For example, 10mg dissolved in 2ml of BAC water gives 5mg/ml, which is 5,000µg/ml.

These figures describe the solution only. They are not dosing guidance.

Storage and handling

Stability varies by compound. Treat these as general ranges.

• Keep vials out of direct light.
• Never freeze a reconstituted vial, and avoid repeated warming and cooling.
• Throw away any solution that turns cloudy or has particles in it. KLOW and GLOW blends are naturally blue because of the GHK-Cu.

Vials vs pens

Purity and third-party testing

Every batch is HPLC-tested by Janoshik Analytical, an independent lab. HPLC (high-performance liquid chromatography) separates a sample into its parts, so the lab can measure how much of it is the target peptide and how much is anything else.

Our batches test at 99%+ purity, and every certificate of analysis (COA) carries a verification key you can check on Janoshik's site.

Good lab practice

• Buy from a verified source and check the batch number on your vial against the COA.
• Use the right diluent. BAC water for multi-use vials; sterile water only if the vial will be used once.
• Keep it sterile. Wipe stoppers every time and use a fresh syringe for every draw.
• Label everything with the compound, concentration and date it was mixed.
• Keep records of batch numbers, storage and handling.

All Peps Central products are sold for laboratory research use only. They are not for human or veterinary use, and nothing in this guide is medical or dosing advice.