We are committed to transparency, accuracy, and quality. Our methylene blue products are manufactured and tested to meet USP-grade specifications, where applicable, and are third-party tested by independent laboratories to verify identity, purity, and quality.

Each Certificate of Analysis (COA) corresponds to a specific production batch (lot) and reflects analytical testing performed at the time of manufacture.

What Is a Certificate of Analysis (COA)?

A Certificate of Analysis (COA) is an official document issued by an independent laboratory that reports analytical test results for a specific product batch.

COAs are used to confirm that a product meets predefined quality specifications, which may include USP or USP-aligned standards.

Typical testing parameters may include:

• Identity confirmation

• Purity / assay

• Heavy metals screening

• Additional quality parameters, when applicable

USP-Grade Testing Standards

Where stated, testing is performed using USP or USP-recognized analytical methods, such as HPLC or ICP-MS, and evaluated against established specifications.

USP-grade refers to compliance with applicable purity and quality standards defined by the United States Pharmacopeia at the time of testing. USP-grade designation does not imply FDA approval.

Batch-Specific (Lot-Specific) Testing

All Certificates of Analysis are batch-specific.

Because analytical results can vary between production runs:

• Each COA applies only to the lot number listed on your product label

• Customers should always reference the matching COA for their specific batch

How to Access a COA

Certificates of Analysis are available through one or more of the following methods:

• Link provided on the product detail page

• Available upon request through customer support

• We don't normally publish COA's publicly in order to help prevent fraudulent activity of our information

To ensure accuracy, please include your lot number when requesting a COA.

Independent Third-Party Laboratories

All testing is conducted by independent, accredited laboratories that are not owned or controlled by our brand. Laboratory credentials, test methods, and testing dates are disclosed directly on each COA.

This independent testing allows us to accurately state that our products are third-party tested for quality verification.

Important COA & Regulatory Disclosure

• COAs are provided for quality verification purposes only

• COAs do not imply FDA approval or endorsement

• Testing results apply only to the specific batch tested

• COAs should not be interpreted as evidence of safety, efficacy, or medical benefit

Our products are not intended to diagnose, treat, cure, or prevent any disease.

Questions About Testing or COAs?

If you have questions about testing methods, specifications, or need help accessing a Certificate of Analysis, please contact us through our website support form or email us at support@thistledewvitality.com and include your product’s name & lot number.