NSF Launches New Certification Guideline to Ensure PFAS-Free Products for Nonfood Compounds and Food Equipment Materials Oxford, UK, March 26, 2025 – NSF, a leading global public health and safety organisation, has announced the launch of a new certification guideline, NSF Certification Guideline 537: PFAS-Free Products for Nonfood Compounds and Food Equipment Materials (NSF 537).