As an agricultural product, Matcha must meet strict food safety regulations. Ensure the supplier provides ISO 22000 or HACCP certification for food safety management. For organic markets, verify USDA Organic, EU Organic, or JAS (Japanese Agricultural Standard) certifications. Crucially, request heavy metal testing reports (Lead, Arsenic, Cadmium) and radiation clearance certificates, especially for tea sourced from specific regions in East Asia, to ensure compliance with international health standards.