Product FAQ
Answers on purity testing, Certificates of Analysis, vial sizes, storage and reconstitution — with links to the cited science guide for each compound.
Short answer: Every PeptidesDirect product is HPLC-tested to ≥99% purity with a lot-specific Certificate of Analysis, ships lyophilised, and is covered by a cited research guide. Read the complete peptides guide, then the compound-specific guides below.
How pure are PeptidesDirect products?
Every batch is tested by reverse-phase HPLC for purity (≥99%) and mass spectrometry for identity, and each vial ships with a lot-specific Certificate of Analysis whose lot number matches the vial you receive. The peptides guide explains how to read a COA.
What vial sizes and strengths are available?
Most peptides come in several strengths — 130 strength options across the catalog — and larger vials cost less per milligram. The pricing page lists the exact price and cost per mg for every strength of every product.
Which product should I read up on first?
Start with the complete peptides guide for an overview of how research peptides are made and tested, then read the compound-specific research guide — we publish cited science guides for Tesamorelin, KPV, NAD+, SS-31, Selank, Semax, Ipamorelin and the CJC-1295/Ipamorelin blend.
How do I store peptide vials?
Store lyophilised (freeze-dried) vials refrigerated or frozen, away from light and moisture. After reconstitution, keep solutions refrigerated at 2–8°C. The storage guide and reconstitution guide cover handling in detail.
What do I reconstitute peptides with?
Bacteriostatic water is the standard reconstitution solution for multi-use research vials. The bacteriostatic water guide and reconstitution guide walk through sterile technique and concentration math.
What's the difference between similar compounds like Semax and Selank?
Our comparison guides put related compounds side by side — Semax vs Selank, Tesamorelin vs Ipamorelin, and CJC-1295 vs Ipamorelin — with published study data, mechanisms and specifications for each.
Are these products for human use?
No. All products sold by PeptidesDirect are strictly for in-vitro laboratory research use only. They are not for human consumption, therapeutic use, veterinary use, or any in-vivo application.
Research guides by compound
- The complete peptides guide
- Tesamorelin Peptide: what the research shows
- KPV Peptide: the α-MSH tripeptide
- NAD+ Research Guide: is NAD+ a peptide?
- SS-31 Peptide (Elamipretide): a mitochondria-targeted tetrapeptide
- Tesamorelin vs Ipamorelin: two routes to GH release
- CJC-1295 vs Ipamorelin: and why they're paired
- Selank Peptide: the tuftsin-derived heptapeptide
- Semax Peptide: the ACTH(4-10) fragment
- Ipamorelin Peptide: the selective secretagogue
- CJC-1295 + Ipamorelin: why the blend is studied
- NAD+ vs NMN: coenzyme vs precursor
Research Use Only. Not for human consumption, therapeutic use, veterinary use, or any in-vivo application.
