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An investigation by USA TODAY reporter Alison Young revealed that a wide array of dietary supplement companies selling products dangerously spiked with hidden pharmaceuticals are headed by executives with criminal backgrounds and run-ins with regulators. They're convicted felons, thieves, drug addicts, narcotic sellers and more, the reporting revealed. And once they enter the lucrative, $30-billion-a-year supplement business, almost anything goes. Criminals turned supplement entrepreneurs have repeatedly put risky products on the market through a changing series of companies as overwhelmed regulators struggled to keep up. Their pills and powders have included everything from a sleep-aid laced with a powerful anti-psychotic drug, to a widely sold workout supplement spiked with a methamphetamine-like chemical never before tested on people.