How Do I Start With Peptides? A Step-by-Step Beginner's Research Guide

Start with the paperwork, not the peptide

The most common mistake new researchers make is choosing a compound before establishing a process. A research peptide program is a documentation exercise first: sourcing, verification, reconstitution, storage, and record-keeping. Get those right and every compound you work with afterward becomes straightforward.

This guide walks through the sequence in order.

Step 1: Define the research question

Decide what you are actually measuring before you buy anything. "Trying peptides" is not a research design. A defined endpoint determines which compound class is relevant — metabolic (GLP-1/GIP/glucagon agonists), repair and recovery (BPC-157, TB-500), growth-hormone secretagogues (CJC-1295, Ipamorelin, Tesamorelin), cosmetic and cellular (GHK-Cu, Glutathione), or mitochondrial (SS-31, MOTS-c, SLU-PP-332).

Browse compound monographs at /peptide-intelligence before committing to a purchase.

Step 2: Source from a supplier that documents lots

Before your first order, ask for a lot-specific Certificate of Analysis. It should include HPLC purity with a chromatogram, mass-spectrometry identity confirmation, endotoxin, sterility, moisture, and residual solvents. A supplier that cannot produce this for your exact lot is not a research supplier.

PX1 publishes per-lot documentation at /purity-reports and /endotoxin-reports.

Step 3: Assemble the basic bench kit

You need very little to start:

• Bacteriostatic water (0.9% benzyl alcohol) for multi-draw reconstitution
• Sterile syringes appropriate to your draw volume
• 70% isopropyl alcohol prep pads
• A sharps container
• A logbook or spreadsheet for lot numbers, reconstitution dates, and concentrations
• Refrigeration at 2–8°C for reconstituted vials

Step 4: Reconstitute correctly

Let the lyophilized vial reach room temperature. Swab both stoppers. Draw your diluent, then inject it slowly down the inside wall of the peptide vial — never directly onto the powder cake. Swirl gently until fully dissolved; do not shake. The solution should be clear and particle-free.

Use /peptide-calculator to convert vial strength and diluent volume into concentration per unit before you draw anything.

Step 5: Label and store

Write the reconstitution date and concentration on the vial. Store reconstituted peptide at 2–8°C, protected from light. Most reconstituted peptides remain stable 28 days under refrigeration; lyophilized vials remain stable 18–24 months at room temperature. Freeze-thaw cycling degrades peptides — aliquot if you need longer storage.

Step 6: Keep records

Log compound, lot number, receipt date, storage conditions, reconstitution date, concentration, and every draw. Without this, results are not reproducible and a bad lot cannot be traced.

What not to do when starting

• Do not start with three compounds simultaneously — you cannot attribute any observation.
• Do not buy from a seller with no lot documentation because the price is 40% lower.
• Do not use unlabeled or expired diluent.
• Do not skip the calculator and estimate concentrations by eye.

Where to begin

Well-characterized, extensively studied compounds make better starting points than novel ones. See the full catalog at /all-peptides.

All PX1 products are supplied strictly for laboratory and research use. Not for human or veterinary use.