National Safety Associates (NSA) is a privately owned marketing company based in Collierville, Tennessee, best known for selling a line of water and air filters, and then the nutritional supplement Juice Plus, via multi-level marketing.
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In 1993, they began selling the nutritional supplement Juice Plus, manufactured by Natural Alternatives International in San Marcos, California.
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NAI manufactures a nutritional supplement known as Juice Plus+ for National Safety Associates.