Irwin Naturals

https://www.irwinnaturals.com Est. 1994 (32 years)

**** Irwin Naturals is an established supplement manufacturer founded in 1994, specializing in herbs, vitamins, and specialty formulations. The company maintains GMP certification and has operated for over three decades with a clean FDA record, including zero warning letters or recalls. However, the brand does not publish lab results or hold third-party testing certifications, which limits transparency regarding product quality verification. **

Red Flags

⚠No third-party testing certifications found

Verified Strengths

✓Established brand — operating since 1994 (32 years)
✓Clean FDA record — no warnings, recalls, or significant adverse events

Certifications

GMP Certified

FDA Record

Warning Letters

Recalls

Adverse Reports

How We Calculated This Score

Every brand starts with a baseline score of 70/100.

Points added for: Third-party certifications (NSF +15, USP +15, Informed Sport +10), publishing lab results (+10), clean FDA record (+10), 10+ years in business (+10), organic certification (+5).

Points deducted for: FDA warning letters (-25), product recalls (-20), high adverse events (-15), no third-party testing (-15), proprietary blends (-10), no GMP (-10).

Score is capped at 0-100. Grade and risk level are derived from the final score.

All data sourced from FDA.gov, NSF.org, USP.org, and publicly available brand information. Last updated: 3/20/2026.