JERUSALEM (Reuters) - Herbalife Ltd. (HLF) said on Sunday it had halted sales of one of its products in Israel amid an investigation by Israel's Health Ministry over complaints from customers that it caused liver problems. Yona Fichman, general manager of Herbalife Israel, said the company was cooperating with the ministry even though there had yet to be a link between the product and what he called abnormal liver test results. A health ministry spokeswoman said eight people reported liver problems over a year and a half, five of whom had consumed Herbalife's Sesame Herb product. She noted that there...