Herbalife announced Thursday that it plans to begin manufacturing its products at a facility in China that the company anticipates will be able to produce nearly two thirds of its products sold in that country.

The Los Angeles supplements company expects to spend up to $40 million to bring the plant in Nanjing on line by the end of next year. Herbalife plans to use the new facility in addition to an existing factory in Suzhou and a botanical extraction facility in Changsha.

“We are experiencing steady and sustainable growth in China and it is important that our infrastructure is robust enough to meet the demand we are seeing now, and expect to see in the future,” Richard Goudis, Herbalife’s chief operating officer, said in a press release.

Herbalife sells weight-loss and nutritional products through a multilevel network of distributors. The company obtained its first direct selling license for China in 2007.

Shares of Herbalife fell $3.43, or 6 percent, to $52.40 Thursday on the NYSE.

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