[Date: May 7, 2025]

When shopping for supplements, you’ll often encounter various certification seals and quality marks. But what do these symbols actually guarantee about product quality and safety?

Our comprehensive guide explains the differences between major certification programs like USP, NSF, and UL. We break down exactly what each organization tests for, how rigorous their standards are, and what limitations exist in their verification processes.

Understanding these distinctions helps consumers make informed decisions about which products meet appropriate safety and quality standards. Not all certification programs are created equal, and this guide highlights which seals provide the most comprehensive quality assurance.

Source: PillWatch