Moreover, fellow multilevel marketing companies Mary Kay Cosmetics or ViSalus, another purveyor of weight loss and nutritional supplements, have both been the subject of scathing take-downs by journalists within the past few months.

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Suppliers found to manufacture goods bound for Wal-Mart in multilevel buildings shared with other factories or shops are now deemed high risk and are removed from the retailer's list of authorized suppliers, the company said in a letter to suppliers in January.

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