After a 10-month investigation, CNBC found many people who had trouble selling Herbalife and sometimes lost thousands of dollars in the process. Herbalife's stock is now in the middle of a major hedge fund battle.
SEC's Director of Enforcement, Robert Khuzami responds to rumor of Herbalife inquiry.
Des Walsh, Herbalife president, responds to claims made by activist investor Bill Ackman that the company is a "pyramid scheme."
Multi-level marketers were a key target of the FTC's Business Opportunity Rule when it was originally proposed. But it turns out the new rule doesn't cover MLMs.
Multi-level marketing companies offer promises of riches to those who sign up. But keep these six questions in mind before you do:
Multi-level marketing is a form of knocking on doors and making calls to directly pitch a product to a customer. But not every company admits to being a direct seller.
Multi-level marketing critic Robert Fitzpatrick talks about pyramid schemes and the MLM industry.
CNBC's Andrew Ross Sorkin reports Third Point's Dan Loeb has bought more than a five percent stake in Herbalife.
CNBC's Herb Greenberg and Gary Kaminsky share their perspective on the battle looming between titans Dan Loeb and Bill Ackman over Herbalife.
Industry critic Robert Fitzpatrick calls multi-level marketing "the Main Street bubble" that will eventually burst.
MLM attorney Kevin Thompson says there's currently no law in the U.S. that clearly delineates good companies from bad.
MLM sales pitch may not be for everybody. Former Herbalife distributors share their stories.