A specialization of devised structured activity. The collection of all programs that constrain the types or amounts of things one eats or drinks. A given diet program might be designed for losing weight (see weight loss program), gaining weight, lowering cholesteral, lowering blood pressure, increasing strength, or some other purpose. Some diet programs are commonly followed for at least partly ethical or religious reasons (e.g. a vegan diet or a kosher diet). When following a diet program, one is diet (q.v.).