Understanding Certificates of Analysis

A Certificate of Analysis (COA) is a document issued by an accredited laboratory that confirms the composition and purity of a product. For natural substances like kratom, kava, and functional mushrooms, COAs are one of the most important tools consumers have to verify product quality.

A proper COA tests for several key factors:

• Identity verification: Confirms the product actually contains what the label claims (e.g., Mitragyna speciosa for kratom).
• Potency/active compounds: Measures the concentration of key active ingredients (e.g., mitragynine content, kavalactone percentage).
• Contaminant screening: Tests for heavy metals (lead, mercury, arsenic, cadmium), pesticides, and microbial contamination (E. coli, salmonella, mold, yeast).
• Solvent residuals: For extracts, confirms no harmful solvents remain from the extraction process.

COAs matter because the natural substance industry is largely unregulated. Without third-party testing, there is no guarantee that a product is safe, pure, or even contains what it claims. A vendor that provides COAs demonstrates a commitment to transparency and consumer safety.

Reading a COA can seem intimidating at first, but the key information is straightforward once you know where to look.

1. Check the lab information

Look for the laboratory name, address, and accreditation. Reputable labs will have ISO 17025 accreditation or state-level certifications. The lab should be an independent third party, not the vendor themselves.

2. Verify the sample details

The COA should identify the specific product, batch/lot number, date of testing, and date of report. The batch number on the COA should match the batch number on your product.

3. Review the results

Results are typically presented in a table format with the analyte (what was tested), the result, and the acceptable limit. Look for "Pass" or "Fail" designations. For potency, compare the measured values against the product label claims.

4. Check the units

Pay attention to units of measurement. Heavy metals are typically measured in parts per million (ppm) or parts per billion (ppb). Potency is usually reported as a percentage or in mg/g.

5. Look for the signature

A legitimate COA will have a signature or approval from a lab analyst or lab director. Digital signatures are common and acceptable.

Not all testing is created equal. Here is what to look for in a vendor's testing program:

• Third-party testing: The lab should be independent of the vendor. In-house testing, while useful for quality control, does not replace independent verification.
• ISO 17025 accreditation: This international standard ensures the lab follows rigorous quality management procedures.
• Batch-specific testing: Each production batch should have its own COA. A single COA reused across multiple batches is a red flag.
• Comprehensive panels: Good testing covers identity, potency, heavy metals, microbials, and pesticides at minimum. Some products may also warrant mycotoxin or solvent residue testing.
• Easily accessible:COAs should be publicly available on the vendor's website, ideally linked to each product or searchable by batch number.
• Recent dates: Testing should be current. COAs older than 12 months may not reflect the current product quality.

Be cautious of vendors or COAs that exhibit any of the following:

• No COAs available: If a vendor does not provide COAs at all, this is the biggest red flag. Do not purchase from vendors who cannot prove their products are tested.
• In-house testing only: Vendors testing their own products without independent verification have an obvious conflict of interest.
• Missing batch numbers: If the COA does not reference a specific batch, it may be a generic or fabricated document.
• Blurry or low-resolution documents: Legitimate COAs are clear, professional documents. Poor quality could indicate tampering or forgery.
• No lab contact information: You should be able to verify the COA by contacting the lab directly. If there is no lab name, address, or phone number, be skeptical.
• Outdated results: COAs from years ago do not tell you anything about the current batch you are buying.
• Incomplete panels: A COA that only shows potency but skips contaminant testing is not giving you the full picture.
• Results that seem too good: Extremely high potency numbers or perfect results across every metric can indicate fabrication.