A real cleanroom
Air filtered to research-grade, so nothing settles into the vial while it's open. A spec, not a slogan.
Stop taking anyone’s word for it.
Most brands give you a purity number and call it a day. Purity's the easy part. Read this before you trust anyone's COA — ours included.
100%—Every batch gets a COA before it’s sold
0—Batches we’ll ever sell without a passing COA
US-made—Newport Beach, CA compounding step
Live—COA library updates with every new batch
Same powder. Different vial.
You've seen the TikToks — "check the purity." But purity just means the powder is good. Everyone's powder is good. Nobody posts a bad one.
Almost every peptide starts as the same powder, from the same overseas factories. Yours, ours, the one your favorite creator is trying to sell you, even what big pharma ships your doctor. That part's settled.
Dirty room. No COA. No accountability.
The vial your FYP sold you.
Newport Beach, CA. Janoshik COA. Published before we sell it.
Ours.
Raw powderSame source. Every brand.
Sealed vialClean lab. Ours.
What happens next is what nobody explains. Turning that powder into a sealed vial is called compounding — and it's where the cheap ones cut corners. Done in a back room, you get the right peptide plus a list of things that shouldn't be near it: endotoxins, structural breakdown, stability that craps out two weeks after you reconstitute it. None of it shows on a purity test. The COA still reads 99%.
Compounded in a US facility, that whole list goes away. It costs two to three times the shortcut, so almost nobody does it. We made the opposite call, the step everyone else skips. Then we send every batch to Janoshik, the gold standard for third-party testing, because you shouldn't have to take our word for it. Same powder. Different vial. That's the difference that matters.
Do your research.
The step everyone else skips.
We said US compounding is the difference. Here's what that step actually does — and what the shortcut leaves out.
Sterile filtration
Every compound runs through a sub-micron filter before it hits the vial. Smaller than bacteria.
Sealed in the room
The vial gets capped inside the cleanroom, not on a back bench. Order of operations matters.
A paper trail on every lot
Who made it, when, against which standard. Pull any lot number, the file exists.
Tested at the end
The shortcut tests raw powder. Real compounding tests the finished vial — what's actually sealed inside.
How to read any COA. Ours included.
Purity's the easy part — here's the rest. This is exactly what's on ours. Run any vendor through the same list. Fails 2+, walk.
Lot number
Matches the stamp on your vial, or you're reading someone else's results.
HPLC purity + chromatogram
The real number and the chart that proves it.
Identity
Proof it's actually the compound on the label.
Endotoxin
The thing the shortcut skips. Screened every batch.
Named third-party lab, with an address
Ours is Janoshik. Not us, them.
Dated within 90 days
Tests expire.
Every PROXILABZ SKU will show all six. COA goes live before the batch is sold.
New batches get published here first.
Before a batch is sold, its COA goes live on this page. No exceptions. That's the rule — not a marketing line.
COA Library
Every batch gets published here before it’s sold. No exceptions.
SuppliesBacteriostatic Water
VerifiedTissue & RepairBPC-157
VerifiedTissue & RepairGHK-Cu
VerifiedNAD+ & CellularNAD+ Nasal Spray
VerifiedMelanocortinMT2 (Melanotan II)
VerifiedNootropic & NeuroSemax
VerifiedMetabolic & GLP-1KLOW
VerifiedGH PeptidesTesamorelin
VerifiedGH PeptidesMOTS-c
VerifiedMetabolic & GLP-1GLP-RT
VerifiedPlain English. No fluff. Just answers.
Everyone asks the same questions. Here they are, straight — no pitch, no spin.
All products sold by PROXILABZ are intended for research use only. Not for human consumption. Not for veterinary use. Not for distribution. Certificates of Analysis are provided for informational transparency and do not constitute an endorsement or approval for any use beyond in-vitro research.