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| Weight loss, in the context of medicine or health, is a reduction of the total body weight, which can mean loss of fluid, muscle or bone mass, or fat. There is a huge market for products which promise to make weight loss easier, quicker, cheaper, reliable, or less painful. These include books, CDs, and other materials, fitness centers, personal coaches, weight loss groups, and food products and supplements. Americans spend an estimated $30 billion a year on all types of diet programs and products, including diet foods and drinks.
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