What to Look for in Lab-Tested Kratom

Why Lab Testing Matters

Without federal regulation of kratom as a food, drug, or supplement, third-party lab testing is the primary mechanism for verifying product safety and quality. A Certificate of Analysis (COA) is the document that communicates these test results. Understanding what constitutes a legitimate, thorough COA is essential for making informed purchasing decisions.

The Four Minimum Test Panels

1. Alkaloid Quantification

This panel measures the concentrations of key alkaloids — primarily mitragynine and 7-hydroxymitragynine — using methods like High-Performance Liquid Chromatography (HPLC) or Liquid Chromatography-Mass Spectrometry (LC-MS). Typical kratom leaf powder contains 1–2% mitragynine and 0.01–0.04% 7-OH by weight. Results outside these ranges warrant investigation.

2. Heavy Metals Screening

Kratom is an agricultural product grown in soil, making heavy metal testing essential. The panel should screen for arsenic, cadmium, lead, and mercury using Inductively Coupled Plasma Mass Spectrometry (ICP-MS). Results are reported in ppm (parts per million) or mg/kg, and should fall within established safety limits.

3. Microbial Analysis

This panel screens for microbial contamination including total plate count (TPC), yeast and mold counts, coliforms, and E. coli. Results are reported in CFU/g (colony-forming units per gram). Acceptable limits vary by standard, but E. coli should be below 100 CFU/g and ideally not detected.

4. Pathogen Testing

Specifically tests for dangerous pathogens like Salmonella (should be absent/not detected in 25g of sample). This is critical because Salmonella contamination in kratom products has led to FDA recalls in the past.

Reading a COA: Step by Step

When reviewing a COA, verify these elements in order:

Lot/batch number: Must match the number on your product packaging. If it does not match, the COA does not apply to your product.

Lab identity: The lab name, address, and accreditation credentials should be clearly stated. Verify the lab is ISO/IEC 17025 accredited through accreditation bodies like ANAB or A2LA.

Test date: COAs older than 12 months may not reflect the current batch. Look for recent testing dates.

Complete panels: All four test panels (alkaloids, heavy metals, microbial, pathogens) should be present. A COA missing any panel is incomplete.

Pass/fail or numerical results: Some COAs report pass/fail; better ones provide specific numerical results with detection limits. Numerical results give you more information to evaluate.

Red Flags in Lab Testing

COA vs AKA GMP: Understanding Both

The strongest vendors carry both lot-specific COAs and AKA GMP certification. Neither alone is sufficient — COAs without GMP mean the product was tested but the manufacturing environment may lack controls. GMP without batch COAs means the facility follows good practices but individual batches are not independently verified.