Consumer Resources

As an independent global health and safety organization, NSF International tests and certifies products and writes standards for the food, water and consumer goods industries. Founded in 1944 as the National Sanitation Foundation, we changed our name to NSF International in 1990 as we expanded our services worldwide. The letters NSF do not represent any specific words today.

Gluten-Free Dietary Supplements

NSF International completed a survey of nearly 1,000 American consumers and found 68 percent don’t realize dietary supplements could contain gluten. Wheat is often used as a filler in dietary supplements. This is why it is important to look for “gluten-free certified” products that undergo robust auditing, testing and certification. NSF International has a gluten-free certification program and has tested and certified 73 different dietary supplements – including probiotic products. View NSF International’s list of certified gluten-free dietary supplements or visit our webpage to learn more.

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Most Popular Q&A

  • Open Can you drink bottled water if the date on the bottle expired?

    Expiration dates are usually for freshness and do not necessarily mean that the product is unsafe to consume, assuming the food item has been properly handled and stored.

    To learn more about food product dating, view NSF’s guide to understanding expiration dates

  • Open What temperature does an NSF certified dryer have to reach under Protocol P154?

    The NSF certified sanitary cycle designation does not specify a minimum temperature that a clothes dryer must achieve. Rather, machines are performance tested using three different organisms (S. aureus, K. pneumoniae and P. aeruginosa) which are added to test swatches and then dried with a typical load of laundry. To achieve certification, the clothes dryer must demonstrate a 99.9 percent reduction of bacteria during the sanitizing dry cycle with no significant carryover of these organisms to subsequent loads.

    A list of clothes dryers that are currently NSF certified can be found in the NSF listings.

  • Open Would H1 registration be equivalent to NSF/ANSI 60 certification?

    NSF H1 registration involves a review of a product’s formulation to determine if it meets U.S. Department of Agriculture (USDA) requirements for use in food processing areas. No physical testing is performed to determine the product’s suitability for use in treating drinking water for human consumption. In contrast, NSF/ANSI 60 requires actual exposure of products to drinking water to determine if the product introduces any impurities that might exceed allowed levels.

  • Open Why should I purchase NSF certified supplements?

    Published reports have shown that not all supplement products contain the ingredients or quantities shown on the label. In some cases, unlisted ingredients can pose a health risk, especially to those with allergies. NSF certification helps give consumers piece of mind by confirming that product label information is accurate and that the manufacturer is following good manufacturing practices.

    Visit the NSF website for the full list of NSF certified supplements.

  • Open Does NSF test for BPA in home water treatment systems?

    All NSF certified water treatment systems undergo material safety testing as well as performance testing for reduction of impurities. Because American National Standards do not prohibit the use of BPA in plastics used to construct water treatment systems, consumers need to contact the manufacturer directly to ascertain whether an ingredient such as BPA is used. If BPA is used in any water treatment product that NSF tests, we conduct a material safety test to ensure that this compound and any others that might be introduced by the system are not present at unsafe levels in the treated water.

  • Open Do I really need to follow expiration dates?

    Yes, especially if you or someone living in your home any health issues. Although not all food labeling dates are for safety, use-by and expiration dates are the two dates to which consumers should pay the most attention. Best Before and Best if Used By dates are quality dates and are not for food safety, while Sell By dates are mostly for store display purposes.

  • Open Where can I purchase a product that I saw on your website?

    NSF International does not manufacture, sell or distribute products. As an independent certification organization, we evaluate samples of products to determine whether they meet voluntary standards for protection of public health. If you are interested in purchasing a product that appears on the NSF website or that claims to have NSF certification, please contact the product’s manufacturer directly for assistance in locating a supplier.

  • Open Are products certified as organic in the U.S. also GMO free?

    Organic products sold in the U.S. are required to be grown, processed and handled from farm to shelf in accordance with USDA National Organic Program (NOP) regulations. While the NOP specifically prohibits the use of genetic engineering or genetically modified organisms in conjunction with organic food, it is possible for an organic crop to be exposed to GMOs from drift (such as wind pollination, birds or bees) or other natural forces beyond the control of the organic farmer. To help limit the impact of non-organic farming practices, the NOP requires organic farmers to follow practices such as creating buffer zones between their own farms and neighboring farms that use conventional farming methods.

  • Open How can I protect friends and family from becoming entrapped in a pool or spa drain?

    If you own your own pool, check to make sure your drain covers and grates meet current anti-entrapment standards set forth in the Pool and Spa Safety Act. Covers that meet these standards will display ANSI/APSP 16 or ANSI/ASME A112.19.8 on the cover’s exterior.

    Make sure your drain covers and grates are properly attached, and never allow anyone to use your pool or spa if a cover is broken or missing. When using a public pool, check for properly attached drain covers and instruct children to keep away from the drains.

  • Open What are the requirements for composting toilets with a “residential” designation?

    These systems are generally intended for use in a home setting. Performance testing is conducted based on the assumption that the toilet will be used for an average of four urine events and 1.2 fecal events per day per household member seven days per week.

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