Is My Supplement Brand Legit? How to Check in 60 Seconds

The FDA does not approve supplements before they're sold. That means the burden of due diligence falls on you. Here's the fastest way to verify any brand.

There are more than 80,000 supplement products on the U.S. market. Almost none of them have been independently tested. Marketing budgets are huge, quality control is optional, and "premium" packaging tells you nothing. Before you spend another dollar, run the brand through this five-step check.

Step 1: Look Up the Brand (10 seconds)

The fastest way to see everything at once — trust score, certifications, FDA recall history, adverse event reports, and ingredient transparency — is to type the brand name into our free checker.

Search SupplementChecker →

We aggregate public data from the FDA's openFDA and CAERS databases, NSF International, USP, Informed Sport, Health Canada, and FTC enforcement actions. If the brand has been recalled, warned, or sued, you'll see it on the brand page. If it's certified, you'll see exactly which body certified it and for which products.

Step 2: Check for an Independent Certification (15 seconds)

A legit brand will carry at least one recognized third-party seal on the product label. The ones that actually mean something:

• NSF Certified for Sport — batch-level testing, banned substance screening, facility audits.
• USP Verified — identity, potency, purity, manufacturing standards.
• Informed Sport — batch-level testing run by LGC.

Anything else — "tested in a GMP-certified facility," "lab-verified," "pharmaceutical grade" — is marketing copy written by the brand itself. See our full NSF vs USP vs Informed Sport breakdown for the differences that matter.

Step 3: Check the FDA Record (10 seconds)

Any brand's page on SupplementChecker shows FDA recalls, warning letters, and adverse event reports. You're looking for three things:

1. Recalls. One or two historical recalls aren't a death sentence — reputable brands sometimes catch their own problems and voluntarily pull product. Patterns are the problem.
2. Warning letters. An FDA warning letter means the brand failed an inspection or made illegal claims. These are public record.
3. Adverse event reports. Multiple serious reports should make you stop.

If the brand has a clean FDA record, that's a meaningful baseline — especially for a brand that's been in market for 10+ years.

Step 4: Read the Label for Proprietary Blends (15 seconds)

A proprietary blend is a legal way for a brand to hide ingredient doses. The label lists a total blend weight but not how much of each ingredient is inside. This is a red flag in 2026 — it means the brand doesn't want you comparing their formula to competitors, usually because the active ingredients are underdosed.

Legit brands disclose every dose. If you see "Proprietary Formula: 1,200mg" on the label with no per-ingredient breakdown, assume the expensive ingredient is a sprinkle. More detail in our proprietary blends guide.

Step 5: Ask for a Certificate of Analysis (10 seconds)

Go to the brand's website and look for a Certificate of Analysis (COA) — the lab report for a specific batch of product. Good brands publish these publicly or send them on request within 24 hours.

If the brand refuses, stalls, or sends a generic "product specification sheet" instead of a real lab result, that's your answer.

What a Legit Brand Looks Like

A trustworthy supplement brand hits all five checks:

• Verifiable trust score on SupplementChecker
• At least one real third-party certification (NSF, USP, Informed Sport)
• Clean or mostly clean FDA record
• No proprietary blends — every dose disclosed
• Publishes or freely sends Certificates of Analysis

If the brand fails two or more of these checks, keep shopping. The market has plenty of brands that pass all five.