How to check a supplement website before buying
Before paying, check where the buy button leads, verify the website address, compare the label and seller details, understand any affiliate link, and use the documented purchase route. A page calling itself the “official website” does not establish that it belongs to the manufacturer.
1. Check where the buy button takes you
Open the order page without entering payment details. Look at the website address and the items being sold.
- The purchase routes we verified use payment services such as
*.pay.clickbank.net,buygoods.com, orsecure.digistore24.com. The order form should show the product, price, and order-support details. - An affiliate page may send you through a commission-tracking link before reaching the seller’s checkout. Examples include
hop.clickbank.net,aff_id=, and tracking domains such asmwebnixormwebsignalhq. Reaching the seller’s checkout does not make the affiliate page the manufacturer’s website or establish that its claims came from the manufacturer. - A copycat may copy the appearance of a payment page. If you cannot verify the checkout address, stop before paying.
2. Check the website address
The address can offer useful clues, but it does not prove who owns the site.
- Registration date: a newly registered address claiming years of history needs further checking. It could be a copycat or a relaunched site. Free RDAP lookups show registration details.
- Prefixes: an address beginning with “the” is not automatically a copycat. Check where its purchase buttons lead and whether the seller details match.
- Similar addresses: we found groups using country names, different endings, and prefixes such as
us.,en., andgo.. Compare each address with the seller website documented in the review. - Inactive sites: a parked address can later become an active sales page. An earlier check may no longer describe it.
3. Compare the label and seller details
Check the Supplement Facts panel against the verified label in our review. A Synadentix copycat showed invented individual doses, even though the verified label gives only a 400 mg blend total.
Read the legal pages too. Missing details and copied text can reveal problems. We found a dental site advertising a diabetes formula in its affiliate information, and a capsule product described as a “dropper” in its FAQ.
Check FDA claims carefully. Dietary supplements are not FDA-approved. Facility registration is different from product approval, regardless of who makes the claim.
4. Understand what an affiliate link means
An affiliate can earn a commission when its link leads to a purchase. That alone does not mean the product is counterfeit. If the link ends at the seller’s own checkout, the order may still be for the genuine product. But an affiliate presenting itself as the manufacturer misrepresents its role.
Marketplace orders need separate checking. Counterfeit stock has been documented in third-party Amazon and Walmart listings, and vendors in this category prohibit marketplace sales in their affiliate terms.
5. Use the documented purchase route
Use the purchase route documented in the product review, and compare the domain and checkout before ordering. Our reviews list observed copycat domains with screenshots and registration dates. Each product website at {slug}.isupplementreviews.com also has an /is-it-legit/ page explaining how we verified the seller’s checkout. Compare the destination before ordering.
Examples include ProDentim, with 15 documented copycats; Synadentix, with a fabricated manufacturer on a copycat page; and DentaBiome, with five copycats, two registered on the same day.
See the documented purchase routes for ProDentim, Synadentix, and DentaBiome. These are our independent verification pages.