Kaer prioritizes verification, testing and quality control. Our products are thoroughly tested for a comprehensive range of contaminants, including heavy metals, pesticides, sulfur dioxide, aflatoxins and aristolochic acid. We also put our herbs through an authentication process to ensure they are of the correct origin and species. A Certificate of Analysis (COA) is produced with each batch of herbs to verify their quality. Only batches that fulfill the ‘Golden Standard’ — a set of strict safety standards established by U.S., Singapore, the E.U. and Japan — are distributed.