All of our herbal ingredients come with Certificate of Analysis (COA). A Certificate of Analysis (COA) is a document that communicates the results of a scientific test done on a product such as food or drugs. The COA also lists the chemicals used in the product's manufacturing and testing and is created to ensure all important regulations are met and complied with. All African herbs come with a COA, Raw Material Product Specification (RMPS), Physical Specification, Analytical Data, Microbial Limits, etc. Additionally, you can always get herbs analyzed by a lab if you really doubt the authenticity of any herb on the market, including ours. Most people know an herb is authentic by the efficacy of the herb (feeling and seeing it work) and/or by knowing the color, density, and smell of an herb.