The Library: Plain-English Answers on Peptides

Peptide Basics

10Start here: what peptides are.

What are peptides? Peptide vs. protein How are peptides made? Peptides vs. amino acids What does peptide sequence mean? Are peptides natural or synthetic? What is a peptide bond? How do peptides work? The main types of peptides What is a bioactive peptide?

The Science of Peptides

10Properties and terminology.

What does “agonist” mean? What is peptide half-life? What is molecular weight? What is net peptide content? What is peptide solubility? What is a peptide analog? What is a peptide fragment? What are cyclic peptides? What is a peptide hormone? What is bioavailability?

Research Use, Legality & Compliance

10What research use only means.

What does research use only mean? What is a research peptide? Are research peptides legal? Research vs. pharmaceutical grade Who can buy research peptides? Why not for human consumption? Do you need a prescription? Are peptides a controlled substance? Why not FDA-approved? What are gray-market peptides?

Quality, Testing & Sourcing

14How to source with confidence.

What is a certificate of analysis? How to verify peptide purity What does purity percentage mean? Is a peptide vendor legit? Where do research peptides come from? What makes a high-quality peptide? Why do peptide prices vary? What is third-party testing? How is peptide purity tested? What should a label include? How are peptides shipped? Questions to ask before buying How to choose a supplier How to read a peptide COA

Storage, Handling & Reconstitution

11Preparing and storing peptides.

How to reconstitute a peptide What is bacteriostatic water? How should peptides be stored? How long do reconstituted peptides last? Do peptides need refrigeration? What is a lyophilized peptide? Why do peptides come as powder? What is a peptide vial? How to avoid contamination Can peptides go bad? What is peptide shelf life?

BPC-157, TB-500, GHK-Cu & Blends

7BPC-157, TB-500, GHK-Cu and blends.

What is BPC-157? What is TB-500? BPC-157 vs. TB-500 What is GHK-Cu? What are peptide blends? What is the GLOW blend? What is the KLOW blend?

GLP-1 & Related Receptor Peptides

10Semaglutide, Tirzepatide, and more.

What is Semaglutide? What is Tirzepatide? What is Retatrutide? Semaglutide vs. Tirzepatide What are GLP-1 receptor peptides? What is Cagrilintide? Cagrilintide vs. Semaglutide What is MOTS-c? What is SS-31? What is NAD+?

Growth Hormone Peptides

9Secretagogues and GHRH analogs.

What are GH secretagogues? What is Sermorelin? What is CJC-1295? What is Ipamorelin? CJC-1295 + Ipamorelin What is Tesamorelin? Sermorelin vs. CJC-1295 CJC-1295 vs. Ipamorelin What is IGF-1 LR3?

Other Research Peptides

8Melanocortin, neuro, and more.

What is PT-141? What is Melanotan II? PT-141 vs. Melanotan II What is Kisspeptin-10? What is Semax? What is Selank? Semax vs. Selank What is Glutathione?

Category Comparisons

5How peptides compare to other classes.

Peptides vs. SARMs Peptides vs. steroids Peptides vs. HGH Peptides vs. collagen Research peptides vs. supplements

Axis Peptide Labs supplies reference compounds for laboratory, academic, and institutional research only. All products are for research and identification purposes only. They are not for human or veterinary use, and are not a food, cosmetic, drug, or medical product. This library is educational and does not constitute medical, health, or usage advice.

Welcome offer

10% off your first order

Join the Axis research list for batch COAs, restock alerts, and your one-time welcome discount.

Research use only. One discount per customer. Unsubscribe anytime.

✓

Your 10% off is ready

Tap the code to copy it, then paste it at checkout. We’ve also emailed it to you.

Copied ✓ Shop the catalog →

One discount per customer. Valid on your first order.

Straight answers on peptides.