https://www.fda.gov/food/gras-notice-inventory/agency-response-letter-gras-notice-no-grn-000641
Agency Response Letter GRAS Notice No. GRN 000641 | FDA
Pyrroloquinoline quinone disodium salt is GRAS for use as an ingredient in energy, sport, and isotonic drinks and in fortified water beverages.
response letteragencygrasnoticegrn