Question 1

How do you vet a peptide supplier before ordering?

Accepted Answer

Check for a batch-specific Certificate of Analysis (COA) from an independent lab like Janoshik Analytical, verify the business is registered with a real address, confirm they ship with cold chain packaging, and ensure the product arrives as lyophilised powder in a vacuum-sealed vial. Ask for the HPLC purity on the most recent batch and check that the batch number on the COA matches the vial you receive.

Question 2

What are red flags when buying peptides online?

Accepted Answer

Major red flags include no COA or only self-tested results, Telegram-only communication with no registered business, pre-mixed liquid shipped without cold chain, prices significantly below market rate, crypto-only payment with no returns policy, and TikTok dropshippers who relabel bulk product. If the supplier cannot provide a verifiable third-party lab report, walk.

Question 3

How do you verify a peptide COA is real?

Accepted Answer

Check six fields: the lab name should be an independent company you can Google, the batch number should match your vial, the test date should be recent, HPLC purity should be above 98%, endotoxin testing should be present, and the report should have a verification key you can check directly with the lab. Janoshik Analytical assigns verifiable keys at janoshik.com/verify. If the COA has no verification mechanism, it could be fabricated.

Question 4

What questions should you ask a peptide supplier before ordering?

Accepted Answer

Ask four questions: Can you provide a batch-specific COA tested by an independent lab? How do you ship and what cold chain do you use? What is your returns policy if the product arrives compromised? Do you have a registered business entity? Good suppliers answer with specifics. Bad suppliers answer with marketing language like 'all our products are pharmaceutical grade' or 'we're a global operation.'

Is your supplier legit?

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