The weight loss wars are heating up in the direct sales universe. For years, Herbalife has encouraged consumers to shed fat via its, “Lose Weight Now, Ask Me How” campaign, but now, Amway is ramping up a program of its own with BodyKey by Nutrilite, a weight management program that uses a genetic test or a comprehensive assessment based on validated science to help consumers determine an ideal weight management approach. “Research shows that evaluating physical and life habi...