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Health experts have long decried the pursuit of losing weight and limiting calories for purely cosmetic reasons, especially when extreme measures are involved. However, those same experts also have historically agreed that if you are overweight, you are endangering your health, and you could benefit by losing weight. However, the authors of the New England Journal editorial stated that even the health benefits of weight reduction are not as clear-cut as most believe. While a few specific medical conditions are clearly helped by weight loss, the health advantages otherwise of losing weight are not at all well-established. The optimal BMI is usually considered to be 21, but the risk of death does not even double compared to someone with an ideal weight until the BMI exceeds 28.