How to Verify a Supplement Manufacturer Is Real
Anyone can print a company name on a bottle. Here's what actually distinguishes an identifiable, accountable manufacturer from a name with nothing behind it.
Start with the label, not the website
US dietary supplement labeling rules require the name and place of business of the manufacturer, packer, or distributor to appear on the label itself — not just somewhere on a marketing website. If a product's own physical label doesn't name a company and a real location, that's the first and most direct gap, more telling than anything on the site selling it.
What a real address should let you do
A legitimate manufacturer's address is usually a facility that can be looked up — sometimes a warehouse or production site, sometimes a registered-agent address if the company is a smaller LLC (which is completely normal and legal, not itself a red flag). What matters is whether the name attached to that address is a real, registered business entity, checkable through your state's Secretary of State business search — most states offer this free, and it takes under a minute to confirm a company is actually registered and active.
FDA facility registration is a separate, checkable fact
Facilities that manufacture dietary supplements for the US market are generally required to register with the FDA. This registration doesn't mean the FDA evaluated the product — see our companion guide on what FDA registration actually covers — but it does mean the facility is on file and identifiable. A manufacturer that's cagey about even confirming this, when asked directly, is worth a second look.
Signs worth noticing, not signs of certainty
No single detail proves a manufacturer is illegitimate on its own — small, real companies sometimes have thin web presences, and that's not automatically a problem. What's worth noticing in combination: a company name that doesn't match anything findable in a state business registry, an address that turns out to be an unrelated business (a private residence, a different storefront entirely) rather than a registered-agent or production facility, and a total absence of any way to contact the company directly outside of the product's own sales page.