The short answer: A legitimate seller is easy to identify. It shows who it is, where it is, which lab tested each batch, and what its products are and are not. If any of those are missing, slow down. This checklist works for any seller, including ours.
Educational only. This page is general information. It is not medical advice or legal advice. Talk to a licensed clinician about your health and to a lawyer about legal questions.
Why it matters: counterfeit and mislabeled products are a real problem online. On September 29, 2026, the FDA announced charges against two people over an alleged scheme to distribute counterfeit prescription drugs, and the agency's acting commissioner said counterfeiting the American drug supply is "a direct threat to public health and patient safety." Those charges are allegations and the defendants are presumed innocent. The story shows why checking any seller matters.
1. Can you tell who they are?
Look for a business name, a physical U.S. address, a working phone number and a real email domain. FDA's guidance on buying medicines online lists the same basics: a physical address and telephone number in the U.S. If the only contact is a social media account or a form, that is a flag.
2. Can you see the testing?
A legitimate seller publishes or provides a certificate of analysis for each batch, with the lab named. Our guide to reading a certificate of analysis covers each section. If you cannot get a report tied to your lot number, the seller is asking for trust it has not earned.
3. Is the marketing consistent with the label?
Check that the label, the website and the sales language all describe the product the same way. A product described as being for laboratory work should be presented that way everywhere, not just on the label. The FDA has said it looks at how a product is marketed as well as how it is labeled; our guide Are peptides legal? explains this. Read the whole site, not just the label.
4. Are there health promises?
Be cautious of before-and-after promises, "miracle" language, testimonials that describe medical results, or claims to treat conditions. Legitimate educational companies explain; they do not promise outcomes.
5. Is the price believable?
FDA's online-pharmacy guidance warns about sellers that offer deep discounts or prices that seem too good to be true. A price far below everyone else's is a reason to ask more questions.
6. Is there a clear return, shipping and support policy?
Look for a stated process for damaged or wrong orders and a real way to reach a person. When an order arrives, check the packaging. FDA's guidance flags medicine that arrives in broken or damaged packaging, or with no expiration date or an expired one.
7. Does the company have a track record?
Search the company name with words like "complaint," "warning letter" or "reviews," and read sources you can verify. The FDA publishes its warning letters on its website. Absence of results is not proof of quality, and a few bad reviews are normal. A pattern is what matters.
8. Does it tell you to talk to a professional?
Companies that care about the people reading them say so, and they put the disclaimer where you can see it. Anything that discourages you from talking to a clinician is a red flag.
Quick scorecard
| Check | Good sign | Warning sign |
|---|---|---|
| Identity | Name, address, phone | Social handle only |
| Testing | Named lab, lot-specific report | "Third-party tested," no name |
| Marketing | Label, website and sales language agree | Messages that contradict each other |
| Claims | Educational | Promises of results |
| Price | In line with the market | Far below the market |
Frequently asked questions
Is a professional-looking website proof of legitimacy?
No. Appearance is cheap to copy. Check identity, testing and consistency.
Does a "made in the USA" statement mean it is safe?
Not by itself. It says where something was made, not how it was tested or labeled.
Should I trust reviews on the seller's own site?
Treat them as marketing. Look for independent sources.
What if I think I received a counterfeit or unsafe product?
Do not use it. FDA has an online form to report sales of medicine on the internet, and its consumer line is 1-888-INFO-FDA.
Are products sold online the same as prescription medicines?
No. FDA says legitimate online pharmacies always require a doctor's prescription. See Are peptides legal?
Can I rely on this checklist for medical decisions?
No. It helps you judge a seller. It does not tell you whether any product is right for you.
Sources
Every factual claim on this page was checked against the sources below when it was published.
- U.S. FDA press announcement, September 29, 2026: FDA Investigation Leads to Charges Against Two Indian Nationals Involved in Transnational Counterfeit Drug Distribution Scheme. https://www.fda.gov/news-events/press-announcements/fda-investigation-leads-charges-against-two-indian-nationals-involved-transnational-counterfeit-drug
- U.S. FDA: Safe online pharmacy guidance for consumers. https://www.fda.gov/consumers/consumer-updates/how-buy-medicines-safely-online-pharmacy
Disclaimer. US Prime Biolabs provides educational information only. It is not medical advice. Always talk to a licensed healthcare professional before making decisions about your health.
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