A food-grade lubricant (oil or grease) certified NSF H1 or INS must meet specific criteria relating to food compatibility. It is susceptible to come into accidental contact with the food being produced, following a leak, overflow or a lubrication fault, and this with total safety for the food produced.

Specifically, NSF H1 accreditation indicates the specific lubricant is acceptable for incidental food contact and can be used in food processing areas. ... It accounts for the lubricant and its ingredients, as well as the manufacturing process, handling, packaging and storage.