GMP Certified Supplements: Meaning and Proof in 2026 

In 2026, buyers want proof, not hype. This guide explains what gmp certified supplements mean, what GMP controls in dietary supplement manufacturing, and what GMP does not guarantee. Then it compares GMP claims with third-party programs like USP Verified, NSF, and Informed-Sport. Finally, you get a simple checklist to verify certificates and shop smarter.