34K views · 21 reactions | There’s a lot of science in that little blue NSF certification mark! NSF International tests more than 30,000 products a year. Learn more at www.nsf.org. | NSF | Facebook

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12 reactions | How well do you know us? Find out more at https://bit.ly/3wUwak1. | NSF | Facebook

Do you have a question about water filters? What about about supplements? Let us help! 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. : info@nsf.org ☎️: +1.800.673.8010 : Facebook Messenger ℹ️: https://www.nsf.org/consumer-contact | NSF | Facebook