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Will all resect, your repeated claims that being "too thin" is unhealthy don't stand up; it's bad science. . Salon columns have claimed (as I recall) that anyone with a BMI of below 18.5 is "unhealthy" and "an example of bad health of young" women. In fact, a large number of professional, women athletes are thus in poor health and poor examples, according to your standards, including tennis star Maria Sharapova, Olympic gold medalist Amanda Beard, professional golfer Michelle Wie --- all of whom have BMIs that are LOWER than supermodel Gisele Bundchen's.
IMHO: http://www.fawcette.net/2007/12/why-tennis-shar.html
Medical researchers actually claim that for people to achieve their maximum potential lifespan approaching 130 years, the key, in fact the only positive factor they can confirm, is to consume 30% fewer calories than is normally recommended and primarily eat salads until you're skin and bones -- sort of like a model .
http://abcnews.go.com/Video/playerIndex?id=1809903&affil=kgo