As these are health-related products, compliance is non-negotiable. Suppliers should ideally hold GMP (Good Manufacturing Practice) and ISO 22000 certifications. For entry into the US market, FDA registration is required, and for the EU, compliance with Novel Food Regulations may apply. If your brand targets the premium market, prioritize suppliers with USDA Organic or EU Organic certifications to ensure the absence of heavy metals and pesticides, which mushrooms easily absorb from their growth medium.