Preparations for use in weight reduction; agents for activating the metabolism; nutritional supplements including dietary supplements and dietary food supplements for medical use; health food supplements for persons with special dietary requirements; capsules of dietetic substances for medical use in weight control; foodstuffs for use in the dietary management of obesity including special dietary foods, beverages and meal replacement substances; vitamin and mineral preparations for use as nutritional additives to foodstuffs; health foods for regulating weight and for use in weight loss diets