Notes

What we have worked out, written down.

Sourcing, testing, labelling and the arithmetic of trade pricing. Written for people reselling this material, not for people taking it. Nothing here is dosing or administration guidance and it never will be.

Latest

5 September 2026 · 4 min read

SourcingTesting

What a peptide supplier actually says when you ask for per-batch COAs

We asked our manufacturer contact for a certificate against the batch we were about to ship. The honest answer changed how this whole business is built, and it is the answer most of your suppliers are giving you too.

Read it

5 September 2026 · 6 min

Two weeks trying to become a peptide reseller, and everything I got wrong

I set out to buy wholesale peptides and resell them. Inside a fortnight I had published a false claim, nearly stripped a lab's watermark off a certificate, and priced a 5mg vial above a 10mg one. Here is the whole thing.

Field notes

4 September 2026 · 3 min

Why wholesale peptide pricing is quoted per box, not per vial

How freight, tier gates and the per-SKU minimum quietly decide your margin, and the arithmetic that tells you whether a supplier's price break is real.

Pricing

4 September 2026 · 3 min

Storage, cold chain and what actually degrades a lyophilised peptide

Freeze dried peptides are far more robust in transit than most resellers assume, and far more fragile once reconstituted. The difference matters for what you promise your customers.

Handling

4 September 2026 · 4 min

Putting your own label on wholesale peptides

The three ways a reseller can brand a vial, what each one costs in money and lead time, and why most new brands pick the wrong one first.

Sourcing

4 September 2026 · 3 min

How to read a peptide certificate of analysis

What HPLC purity, mass spec identity and net peptide content actually tell you, and the four things on a COA that quietly mean nothing at all.

Testing
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