Mannatech, Incorporated (NASDAQ: MTEX) announced net sales of $40.7 million for the second quarter ended June 30, 2019. The $40.7 million was a decrease of $4.4 million, or 9.8 percent, as compared to $45.1 million in the second quarter of 2018. For the three months ended June 30, 2019, net sales declined 5.5 percent on a constant […]