sentences:  In December 2017, Mannatech reached an agreement with the Town Council of Flower Mound, Texas, to relocate its headquarters to an existing facility in the city.Starting in 2004, neurosurgeon and conservative politician Ben Carson made videos and spoke at company events promoting Mannatech and its products.In 2004, in a speech at a Mannatech event, he credited the company's products with the disappearance of his cancer symptoms.