Kratom Heavy Metals Testing: What to Look For

Plants absorb what’s in their soil — which is why heavy-metal testing is essential for kratom. Here’s what a good test covers and what’s acceptable.

The big four

• Lead — neurotoxic; must be minimal.
• Arsenic — inorganic forms are the concern.
• Cadmium — accumulates in kidneys.
• Mercury — should be at or below trace limits.

How to check

A COA lists each metal’s measured concentration against an acceptable limit. If a vendor can’t show this, don’t buy. We provide COAs for every batch — see our lab testing.

Why sourcing matters

Reputable growers and tested supply chains keep metals low. It’s a core reason we stock only verified MIT45.