Herbalife reported quarterly earnings that beat analysts' expectations and revenue that was in line on Monday.
After the earnings announcement, the company's shares initially rose but later wavered in extended-hours trading. (Click here to track the company's shares following the report.)
Net income was $152.1 million, or $1.41 per diluted share, compared to $111.9 million and earnings per share of 98 cents a year-ago ago.
The company posted third-quarter earnings excluding items of $1.41 per share, up from $1.04 a share in the year-earlier period.
Revenue increased 19 percent to $1.21 billion from $1.02 billion a year ago.
Analysts had expected the nutritional supplement maker to report earnings excluding items of $1.14 a share on $1.20 billion in revenue, according to a consensus estimate from Thomson Reuters.
Third-quarter adjusted net sales came in at $1.52 billion compared to $1.12 billion in the year ago earlier period.
During the current quarter, the company forecast earnings in a range of $1.11 to $1.15 vs. analyst estimates of $1.15 per share and net sales growth of between 13.5 percent and 15.5 percent.
For the full fiscal year 2014, it forecast net sales growth of between 9 percent and 11 percent.
"Our initial 2014 guidance demonstrates our belief that the macro trend of global obesity will increase worldwide consumer demand for our products," Herbalife CEO Michael Johnson said.
Earlier the company announced that it appointed former U.S. Surgeon General Richard Carmona to its Board of Directors, effective October 25, 2013.
"Dr. Carmona has dedicated his life to improving the relationships among health, culture, education and economic status, Johnson said. "We look forward to leveraging his expertise in our ongoing initiative to ensure the nutritional benefits of all Herbalife products."