We Analyzed 567+ Supplement Brands. Here's What We Found.

We checked the certifications, FDA records, and transparency signals for 567 supplement brands. The results are both encouraging and alarming.

The Key Numbers

Finding #1: Most Brands Don't Test Their Products

86% of the brands we analyzed have no verified third-party testing. That's 486 out of 567 brands with no NSF, USP, or Informed Sport certification — and no evidence of independent lab testing.

This means the majority of supplements on the market are only tested by the company that makes them. Given that the FDA doesn't test supplements before sale, consumers are largely on the honor system.

Only 38 brands carry NSF Certified for Sport status — the gold standard. 9 have USP verification.

Finding #2: FDA Issues Are More Common Than You'd Think

Across 567 brands:

• 22 brands have at least one FDA recall on record
• 8 brands have FDA warning letters or Class I enforcement actions
• 152 brands have FDA adverse event reports
• 30 brands have 20+ adverse event reports

FDA recalls in the supplement space are overwhelmingly triggered by undeclared pharmaceutical ingredients — hidden drugs in products marketed as "natural" supplements.

Finding #3: Trust Score Distribution

Our algorithm scores brands from 0-100 based on certifications, FDA history, and transparency signals. Here's how 567 brands distributed:

The average trust score is 68/100. The bulk of brands cluster in the B/B+ range — decent but not exceptional. 65 brands earned A+, while 36 scored D or F.

Finding #4: Price Doesn't Predict Quality

Some of the lowest-scoring brands are budget store brands (Spring Valley, Finest Nutrition), but some premium-priced brands also score poorly due to lack of certifications or FDA issues. Meanwhile, several affordable brands (Kirkland Signature, Nature Made) score well thanks to USP verification.

What This Means for Consumers

1. Certifications matter more than brand reputation. Look for NSF, USP, or Informed Sport — not marketing claims.
2. Check FDA records. A brand's history of recalls and warning letters is public information. Use it.
3. Price isn't a proxy for quality. Some cheap brands are well-certified. Some expensive brands aren't.
4. The industry needs more transparency. When 86% of brands have no independent testing, something is broken.

Methodology

We analyzed 567 supplement brands using data from the FDA (warning letters, recalls, adverse events), NSF International, USP, and Informed Sport/Choice. Each brand was scored using our transparent algorithm that weighs certifications, FDA history, and transparency signals.

This analysis represents a snapshot as of our last data refresh. Brands can improve (or worsen) over time. Search any brand for its current trust score.