Guides — judge the evidence yourself

You don't have to take our word for anything. These guides teach you to read a supplement lab report the way we do — so you can check any product, listed here or not.

• 🔬 How to read a supplement COA

  A certificate of analysis tells you what is actually in the jar — if you know where to look. The five things to check on any supplement lab report, and the red flags that make one worthless.

  Updated 2026-11-04

• ⚖️ EU heavy metal limits for supplements, explained

  Lead 3.0, cadmium 1.0, mercury 0.1 mg/kg — and no limit at all for arsenic. What Regulation (EU) 2023/915 actually says about food supplements, and how to read results against it.

  Updated 2026-11-04

• 🏷️ Why the batch number on a lab report matters

  A lab report without a batch number proves nothing about the jar in your hand. Why batch-level testing is the only honest standard, and how to match a report to your product.

  Updated 2026-11-04

Information only, not medical advice. Our methodology