Articles / Certifications

Not all supplement certifications are equal. If you’ve ever spotted seals like USP Verified or NSF Certified for Sport on a bottle, you’ve likely asked: Can I actually trust this?

This hub explores the most respected third-party certifications for supplements—what they test for, how they’re awarded, and whether they make a product safer or more effective.

Why Supplement Certifications Matter

In the U.S., dietary supplements aren’t required to prove purity, potency, or effectiveness before going to market. Third-party testing programs help fill the gap by verifying:

• Ingredient identity and dosage accuracy
• Contaminant levels (heavy metals, microbes, pesticides)
• Absence of banned substances
• Manufacturing compliance (e.g., cGMP)

What You’ll Find in This Section

We break down the science and credibility behind leading supplement quality seals — so you can separate marketing from meaningful standards. Below, you’ll find all articles in this category.

Before You Trust the Label…

A certified product might be clean, but that doesn’t mean it’s effective. At Sighed Effects, we evaluate both the testing — and the science behind the label.