Quality Promise

99% purity or your money back....plus we cover the test.

We say 99%+ purity on every Certificate of Analysis. That's not a marketing number — it's a verifiable claim. Have any of our products independently tested. If the result falls short, we'll refund your order and reimburse your testing fee. No bureaucracy. No argument.

Quality Promise

Why purity is the only metric that matters

In research chemistry, the integrity of a study starts with the integrity of the compound. An impure or mislabelled sample doesn't just waste materials — it invalidates results, distorts observations, and can render months of work meaningless.

Most peptide suppliers don't publish batch-specific data. They rely on a single COA from their manufacturer and never independently verify it. That is the gap Pure Grade Labs was built to close.

99% purity or your money back....plus we cover the test.

CLICK TO ENLARGE

Why purity is the only metric that matters

Minimum Purity Threshold

Every batch is held to 99%+ purity by HPLC analysis before it leaves our supply chain. Below this threshold, we do not sell it.

COA on Every Product

Every product page publishes its Certificate of Analysis from an independent accredited laboratory. Accessible before you buy — no request required.

GMP-Synthesised Source

We source exclusively from GMP-compliant synthesis facilities. Production standards are non-negotiable from the start of the chain.

Pure Grade Labs Quality Promise

Test any of our products with an accredited third-party HPLC or mass spectrometry laboratory.

If the purity result comes back below 99% for the stated compound, we will issue a full refund on your order

Additionally we will reimburse your testing fee, up to £200. Valid for HPLC/MS analysis from an accredited laboratory.

Why we can make this promise

We reject batches less than 99%

Any batch returning below 99% purity in our pre-listing testing is removed from stock. We do not sell it at a discount, and we do not relabel it.

HPLC analysis as standard.

All purity testing is conducted by HPLC — the same methodology required to validate a guarantee claim. Our standard and our testing method are identical.

COA for every product.

Every product listing includes its Certificate of Analysis from an independent accredited laboratory. You can verify what you're buying before you place an order.