Frequently Asked Questions
From everyday consumer concerns to industry-specific inquiries, our FAQs offer clarity across a wide range of topics. Discover insights into NSF’s role in product safety, testing, certification and more.
Here you'll find answers to common questions about our mission, services, certifications, and the standards we uphold to protect public health and safety. Whether you're exploring product testing, food safety, water quality, or other areas, this page is your starting point for trusted information.
NSF Services, Certifications and Marks
Find answers to some of the most frequently asked questions about NSF, including our mission, the services we offer, the types of products we certify and what our certification marks mean.
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Consumer Product Testing and Certification
NSF tests and certifies everyday home products for safety, quality and durability. Explore these FAQs to learn what our certification means for items like dishwashers, cutting boards and measuring cups.
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Food Safety and Organic Food
These helpful tips on food storage, cooking and cleaning are designed to keep food safety top of mind, especially when preparing meals. Follow these best practices to reduce risks and enjoy peace of mind in the kitchen.
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Water Filters
Find answers to your most common questions about selecting, maintaining and evaluating water filters, supported by NSF’s decades of expertise in water treatment technology, testing and certification.
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Personal Care Products and Cosmetics
Explore how NSF helps make personal care products safer, cleaner and more transparent. Through science, testing and trusted certification standards, we evaluate everything from ingredients to labeling.
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Dietary Supplements and Functional Foods
NSF helps ensure the safety, quality and transparency of dietary supplements and functional foods. Through rigorous testing and certification, we support informed choices and consumer confidence.
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