Sourcing and quality: purity, testing and red flags

Because most non-prescription peptides are sold outside the regulated medicine system, quality varies enormously and you carry most of the risk. This guide explains what affects quality and what to be sceptical of. It is consumer awareness, not an endorsement of any seller or of buying unapproved products — and it is not legal advice.

Why quality is so variable

'Research chemical' peptides are not made or checked to medicine standards. Products can be under-dosed, contaminated, mislabelled, or simply not contain what the label says. Nobody independent is guaranteeing purity, sterility or identity the way a regulator would for an approved medicine.

What a certificate of analysis (CoA) does and doesn't tell you

• A CoA typically reports purity (often by HPLC) and identity (often by mass spectrometry) for a tested batch.
• It only means something if it is from an independent lab and actually matches the batch you received — a PDF on a website can be recycled, edited or unrelated to your vial.
• Purity is not the same as sterility or safety, and a CoA says nothing about legality.

Red flags

• Health or dosing claims, before-and-after promises, or 'FDA-approved' language on an unapproved product.
• No batch-specific, independent testing — or a CoA that cannot be traced to your batch.
• Prices far below everyone else, or pressure tactics and limited-time urgency.
• Vague labelling, no lot number, or reconstitution/storage instructions that ignore the cold chain.

Aminove does not sell peptides or endorse vendors, and many peptides are unlawful to sell for human use. This is general information, not legal or medical advice — verify locally and consult a licensed clinician.