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Underweight

An underweight person is a person whose body weight is considered too low to be healthy. Underweight people have a body mass index (BMI) of under 18.5 or a weight 15% to 20% below that normal for their age and height group.

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This is from the Healthy and Natural Weight-Gain Blog. For people who are protein deficient this may be especially helpful. It includes shake recipes that are high-calorie, high-protein, and high-calcium.

Contributed by Laura Daggett

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