Quality & Testing

Where the material comes from

We source from established peptide synthesis facilities operating under ISO-9001 quality systems. Every incoming batch arrives with the manufacturer's own certificate — and we then ignore it, and test independently.

What we test, on every lot

Reverse-phase HPLC — quantifies purity against a reference standard. Our floor is 98%; the great majority of listed lots return 99%+.
Mass spectrometry — confirms the observed molecular weight matches the theoretical mass for the stated sequence. This is what catches a substituted or truncated peptide that would still look clean on HPLC alone.
Sterility screening — finished, sealed vials are checked for microbial growth.
Bacterial endotoxin — LAL testing on finished product.
Water content — Karl Fischer titration on lyophilised material, since residual moisture is the main driver of shelf-life loss.

A lot that misses spec on any of these is rejected. It does not get relabelled, blended down, or sold at a discount — it never enters inventory. That is the entire point of testing.

Lot traceability

Each vial carries a lot number in the format NP-ABBR###-####. Enter that number on the certificates page to pull the exact report for the material you received — not a representative sample, not last quarter's batch.

Handling and storage

Lyophilised peptides are stored at −20°C, protected from light, until the moment they're packed.
Temperature-sensitive lots ship with gel ice packs in an insulated mailer.
NAD+ and GHK-Cu ship in additional light-blocking packaging.
Bacteriostatic water is held and shipped at room temperature.

Storage once it reaches you

Unopened lyophilised vials — stable at −20°C. Short transit at ambient temperature does not meaningfully degrade lyophilised material.
After reconstitution — refrigerate at 2–8°C and protect from light.
Avoid repeated freeze–thaw cycles; they are the fastest way to lose potency.

If something is wrong