New to research peptides? Start here.
A plain-English guide to the compounds, the testing, the paperwork, and the lab handling. Friendly to first-timers — and strictly research-use only.
What are research peptides?
Peptides are short chains of amino acids. Research peptides are versions studied in laboratory settings — they're tools used in vitro to investigate biological pathways, receptor interactions, and assay development.
They are not finished pharmaceutical products, supplements, or consumer goods. They are raw research materials, sold and shipped for laboratory work.
What "Research Use Only" means
Research Use Only (RUO) means the material is intended for in-vitro and laboratory research. It is not for human or veterinary use, food, drug, cosmetic, or therapeutic purposes.
How to read a Certificate of Analysis (COA)
Every order from RHL ships with the COA specific to that batch. Four things to look for:
- Batch / Lot ID — links the COA to your exact material.
- Purity % from HPLC — how clean the material is.
- Identity from mass spectrometry — confirms the molecule matches the label.
- Testing lab name — an independent third party staking its reputation on the result.
Browse every lot's documentation in the COA Library.
Why third-party testing matters
HPLC tells you how pure. Mass spec tells you what it is. Either one alone is incomplete — you want both, from a lab that has no incentive to lie about either number.
A seller who can name the lab and show you the chromatogram is a seller who can be held to their claims. A seller who can't is asking for trust without evidence.
Reconstitution & storage (lab handling)
Most research peptides ship lyophilized (freeze-dried). In that form they are typically stored cold and away from light per the handling notes on the COA.
Reconstitution dissolves the lyophilized solid in a diluent — commonly bacteriostatic water for research workflows. Concentration depends entirely on how much diluent is added to a known mass of peptide. Reconstituted material has a much shorter stable window than the dry powder.
These are handling notes for lab use. They are not — and cannot be read as — dosing or preparation guidance for human use.
Glossary
- Lyophilized
- Freeze-dried into a stable solid powder. The default form most research peptides ship in.
- Reconstitution
- Dissolving a lyophilized solid into a diluent (e.g. bacteriostatic water) for lab use.
- Bac water
- Bacteriostatic water — sterile water with a small amount of benzyl alcohol used as a research-grade diluent.
- HPLC
- High-Performance Liquid Chromatography. Standard method for measuring purity %.
- Mass spec (MS)
- Mass spectrometry. Confirms molecular identity by measuring mass-to-charge ratio.
- COA
- Certificate of Analysis. A per-lot document listing identity, purity, and the testing lab.
- Batch / Lot
- A specific production run. COAs are tied to one batch — different batches have different COAs.
Frequently asked questions
›What are research peptides?
Short chains of amino acids studied in laboratory research. They're tools researchers use to investigate biological pathways in vitro — not products designed for human or veterinary use.
›What does "Research Use Only" actually mean?
It means the material is intended for in-vitro and laboratory research workflows only. It is not approved or sold for human consumption, veterinary use, food, drug, cosmetic, or therapeutic purposes — even if a compound has been studied in other contexts elsewhere.
›How do I read a Certificate of Analysis (COA)?
Look for four things: the batch / lot ID, the purity percentage from HPLC, the identity confirmation from mass spectrometry, and the name of the third-party lab that ran the tests. Every RHL order ships with its batch-specific COA.
›Why does third-party testing matter?
HPLC tells you how pure the material is. Mass spectrometry tells you whether it is the molecule the label claims. A named third-party lab means an independent party is staking their reputation on those results — not the seller.
›How should lyophilized peptides be stored?
Lyophilized (freeze-dried) peptides are typically stored cold and away from light per the COA's handling notes. Reconstituted material has a much shorter stable window — exact handling depends on the diluent and the lab's storage protocol.
›Can you recommend a dose or protocol?
No. We provide education about the compounds, testing, and lab handling. We cannot and do not provide medical advice, dosing, or any guidance on human use. Questions about products, testing, COAs, or orders — happy to help.
Have a question? We're around.
Happy to help with products, testing, COAs, and orders. We can't answer dosage or protocol questions — those fall outside research-use guidance.