In Hollywood, nutritionists sometimes also serve as private chefs or personal trainers for the stars. The huge investments by celebrities in nutrition and weight loss not only bring substantial returns to nutritionists, but also drive them to continuously develop new effective body-shaping methods. Combined with the advertising effect of the celebrities' personal commitment, Beverly Hills nutritionists often become heavyweight figures in the industry, representing new trends in body shaping and beauty. For example, last year's popular regional减肥 method attracted big-name stars like Madonna, Cindy Crawford, and the Brad Pitt couple, who became loyal practitioners. Hiring a relatively famous nutritionist costs customers about $18,000 a year.