Herbalife is in talks with government regulators regarding a probe of the company's business practices and said that the outcome of the talks was uncertain, the company said in a filing on Thursday.
The Federal Trade Commission opened a probe of Herbalife following allegations by hedge fund manager William Ackman that it had a fraudulent business model that he compared to a pyramid scheme. Ackman's Pershing Square Capital Management unveiled a $1 billion short bet against the company in 2012.
Herbalife, which sells weight management products like energy shakes and vitamins, has vehemently rejected Ackman's allegations. It could not be immediately reached for comment on Thursday.