Category: Research Guides

Research-use information only. The peptides discussed are laboratory reference materials, not for human or animal consumption.

The research-peptide market has serious quality variance — the same label can hide anything from a clean, verified reference material to an underdosed or misidentified powder. Because you cannot judge a vial by eye, vetting the supplier is how you protect your work. Here is a practical checklist.

1. Independent COA on every batch

This is non-negotiable. A trustworthy supplier provides a third-party Certificate of Analysis tied to the exact batch you receive — HPLC for purity (≥98%) and mass spectrometry for identity. “We test everything” without a document you can read is just a claim. Generic or batch-less COAs do not count.

2. A real reship / refund policy

Parcels occasionally go missing or arrive damaged. A supplier confident in their operation will state a clear reship or refund policy up front. Silence here means you carry all the risk.

3. Responsiveness to questions

Ask a specific technical question before ordering — about storage, the COA, or batch details. Fast, accurate, non-evasive answers tell you there is a competent operator behind the listing. Slow or vague replies before a sale rarely improve after one.

4. Sensible storage and handling

Does the supplier explain how the material is stored and shipped? Lyophilised peptides are stable in transit, but a vendor who understands cold storage, light protection and freeze–thaw is one who handles stock properly.

5. Honest legal framing

Reputable research suppliers label products clearly as for laboratory research use only — not for human or animal consumption, and do not make therapeutic or dosing claims. A seller making medical promises is both less trustworthy and a legal risk to buy from.

Quick checklist

• ✔ Independent COA per batch (HPLC ≥98% + MS identity)
• ✔ Batch number on the COA matches the vial
• ✔ Stated reship / refund policy
• ✔ Responsive, accurate answers before you buy
• ✔ Clear “research use only” framing, no medical claims

How we measure up

We are Singapore-based with local stock, run an independent COA (HPLC/MS) on every batch and send it on request, publish a shipping and reship policy, and answer questions directly via Telegram. See the catalogue.

Research-use information only, not legal advice. The peptides discussed are laboratory reference materials, not for human or animal consumption. Verify current regulations with the Singapore Health Sciences Authority (HSA).

“Are research peptides legal in Singapore, and how do I source them locally?” is the most common question we get. The honest answer is: it depends entirely on which peptide and how it is sold. This article explains the landscape so you can source responsibly.

The research-use lane

Many peptides are sold legitimately as laboratory reference materials for research use only — reagents, not medicines. In this lane they are explicitly not for human or animal consumption and carry no therapeutic claims. That framing is what keeps them defensible. The moment a product is marketed for human use, dosing, or treatment, it crosses into regulated-medicine territory.

What is off-limits

Some peptides are prescription-only medicines in Singapore and may not be sold to the public even with a “research use” label. The GLP-1 class — semaglutide, tirzepatide, retatrutide and similar — falls here, and the HSA actively acts against unlicensed sale. We do not sell these. Treat any vendor offering GLP-1s to the public as a serious red flag, both for your safety and theirs.

How to source responsibly in Singapore

• Buy research-lane peptides only, clearly labelled for laboratory use.
• Insist on an independent COA per batch — see our guide on reading a COA.
• Prefer local stock. Domestic dispatch avoids customs delays and the temperature/time uncertainty of long international transit.
• Avoid medical claims. A compliant supplier never tells you what a peptide will “do” for a person.
• Check the supplier using our vetting checklist.

Why local matters for buyers

Singapore-based stock means free local shipping, faster dispatch, no customs lottery, and a real point of contact who answers questions. For research material where chain-of-custody and handling matter, that is a meaningful advantage over an anonymous overseas drop-ship.

In short

Research-lane peptides, sold for laboratory use with a batch COA, occupy a defensible position; prescription-only classes like GLP-1s do not. Source from a supplier who understands that distinction and documents their material. Browse our COA-verified, Singapore-stocked catalogue or read the FAQ.

Research-use information only. The peptides discussed are laboratory reference materials, not for human or animal consumption.

A Certificate of Analysis (COA) is the single most important document in research-peptide sourcing. It is the third-party lab report that proves what is actually in the vial. If a supplier cannot produce one tied to your specific batch, there is no way to verify identity or purity — and no reason to buy. Here is how to read one.

The two tests that matter

HPLC — purity

High-Performance Liquid Chromatography separates the contents of the sample and reports each component as a percentage. The headline number is purity. For research peptides you want ≥98%. The chromatogram should show one dominant peak; large secondary peaks indicate impurities or degradation.

Mass Spectrometry (MS) — identity

HPLC tells you how pure the sample is, but not what it is. Mass spectrometry measures the molecular weight and confirms it matches the known weight of the target peptide. A high purity number is meaningless if the MS shows the wrong molecule — you would simply have a very pure wrong compound.

The checks that catch fakes

• Batch number matches your vial. A COA for batch A proves nothing about the vial you received from batch B. Generic or batch-less COAs are a red flag.
• An independent lab issued it. An in-house COA from the seller is weaker evidence than a third-party report.
• The peptide name and molecular weight are stated and match the published values for that peptide.
• A recent date. Identity does not change, but a current report shows the batch was actually tested.

Quick reference

• Purity (HPLC): want ≥98%, single dominant peak.
• Identity (MS): measured mass matches the peptide’s known molecular weight.
• Batch: COA batch number = the number on your vial.
• Source: independent third-party lab, recent date.

Anything vague, missing, or unwilling to be shared = walk away.

How we handle COAs

Every batch we stock is independently tested by HPLC and MS, and the COA is sent on request, tied to the batch number on your vial. You can request a COA before ordering, and browse the catalogue to see what is in stock.

Research-use information only. The peptides discussed are laboratory reference materials, not for human or animal consumption.

Peptides are fragile molecules. Stored correctly they remain stable for a long time; stored badly they degrade and your reference material is no longer reliable. The rules differ sharply depending on whether the peptide is still a freeze-dried powder or has been reconstituted into liquid.

Lyophilised (powder) — long-term stable

• Freezer (-20 °C): typically stable for around 24 months.
• Fridge (2–8 °C): stable for several months.
• Room temperature: fine for shorter periods and, importantly, for the few days a parcel spends in transit.

This is why heat exposure during shipping is not the concern people assume — the powder form is robust over the days it is in the post. Reconstitute only when you are ready to use it.

Reconstituted (liquid) — use within weeks

• Fridge (2–8 °C), protected from light: generally 3–4 weeks when prepared with bacteriostatic water (the benzyl alcohol preservative is what extends this window).
• Prepared with non-preserved water, the usable life is much shorter.

The freeze–thaw rule

Do not repeatedly freeze and thaw a reconstituted vial. Each cycle stresses and degrades the peptide. If you must freeze liquid solution for longer storage, aliquot it into single-use portions first so each is thawed only once.

Quick reference

Form	Storage	Approx. shelf life
Lyophilised powder	-20 °C freezer	~24 months
Lyophilised powder	2–8 °C fridge	Several months
Reconstituted liquid	2–8 °C, dark	3–4 weeks

Practical habits

• Keep powder in the freezer; move to fridge only what you are about to prepare.
• Always protect reconstituted vials from light.
• Label every reconstituted vial with concentration and date.
• Check the batch COA before use — degraded or mishandled material will not match its original report.

See our full handling guides or browse COA-verified stock.

Research-use information only. The peptides discussed are laboratory reference materials, not for human or animal consumption.

Reconstitution is the process of dissolving a lyophilised (freeze-dried) peptide powder into a liquid so it can be measured and used in research. Done correctly, it is simple volumetric dilution; done carelessly, it degrades the peptide or makes your concentrations unreliable. This guide covers the method and the maths.

What you need

• Bacteriostatic water — water containing 0.9% benzyl alcohol. The preservative lets a multi-use vial stay stable for weeks. Use this rather than sterile or distilled water when the solution will be drawn from more than once.
• A sterile syringe for measuring and transferring liquid.
• The peptide’s Certificate of Analysis (COA), to confirm the stated mass before you calculate anything.

The method, step by step

1. Let both vials reach room temperature.
2. Wipe both rubber stoppers with alcohol.
3. Draw your chosen volume of bacteriostatic water.
4. Add the water slowly down the inside wall of the peptide vial — never squirt it directly onto the powder.
5. Do not shake. Swirl gently and let it stand until fully clear. Peptides are fragile; mechanical agitation can break them.
6. Label the vial with the concentration and the date.

The concentration maths

The only formula you need:

milligrams in the vial ÷ millilitres of water added = milligrams per millilitre (mg/ml)

Worked examples:

• 10 mg vial + 2 ml water = 5 mg/ml
• 10 mg vial + 1 ml water = 10 mg/ml
• 5 mg vial + 2.5 ml water = 2 mg/ml

To find the volume that contains a given quantity of peptide, divide the quantity you want by the mg/ml you prepared. The more water you add, the more dilute (and easier to measure precisely) each unit of volume becomes.

Common mistakes

• Shaking the vial. Swirl only.
• Using tap, distilled or sterile water for a multi-use vial. Without a preservative the solution has a much shorter usable life.
• Not labelling. An unlabelled reconstituted vial is unusable data — you no longer know the concentration.
• Skipping the COA check. Your maths is only as good as the stated mass. Verify it against the batch COA first.

After reconstitution

Store the prepared solution refrigerated at 2–8 °C, protected from light, and avoid repeated freeze–thaw cycles. See our guide on handling and storage for shelf-life details, and browse the catalogue for COA-verified reference materials and bacteriostatic water.