Best Protein Powder Brands in 2026 — Ranked by Trust Score

Last updated: May 29, 2026

Protein powder is one of the most commonly adulterated supplements. We ranked 2100 brands by verifiable safety and quality data.

Why Protein Powder Quality Matters

A Clean Label Project study found detectable levels of lead in 75% of protein powders tested. Other studies have found:

• Amino spiking — cheap amino acids added to inflate protein content on lab tests
• Heavy metal contamination — lead, arsenic, cadmium, and mercury in plant-based proteins
• Label inaccuracy — actual protein content sometimes 20-30% less than claimed

This is why third-party testing matters more for protein powder than almost any other supplement.

What to Look for

• NSF Certified for Sport or Informed Sport — tests for banned substances and verifies label claims
• No proprietary blends — you should see exactly how many grams of protein per serving
• Named protein source — "whey protein isolate" is more specific than "protein blend"
• Published COA — Certificate of Analysis showing heavy metal levels

Top Protein Powder Brands by Trust Score