CNN reports that as recently as last year, "two otherwise healthy young men" died after overdosing on the chemical.
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The five companies warned by the FDA were: Smartpowders, Purebulk, National Food Supplements, Hard Eight Nutrition and Bridge City Bulk.
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Matt Lee is a Web producer for Metro New York. He writes about almost everything and anything. Talk to him (or yell at him) on Twitter so he doesn’t feel lonely@mattlee2669.