Want to know if BioPQQ is used in your supplement’s formula? See the list of brands that use Mitsubishi Gas Chemical’s safe and all-natural BioPQQ ingredient, which is manufactured in Japan. It is the most researched ingredient of its kind and the only PQQ compound with a New Dietary Ingredient (NDI) notification from the FDA. If you are unsure about a specific supplement’s ingredients, contact the manufacturer directly for clarification.