Anyone who is 15 to 20% below the normal weight for age and height is classified as underweight, according to Krause (2000).
In real terms, this means that if you are an average woman between the ages of 25 and 50, and you are about 1.63 metres tall, your weight should be approximately 59 kg if you are not underweight.
As soon as your body weight falls to 50 kg (-9 kg or -15%), or even 47 kg (-12 kg or -20%), you are underweight. Expressed in terms of body mass index (BMI), our standard woman weighing 59 kg would have a BMI of 22. As her weight drops, her BMI would reduce to 18,8 (-15% of body weight), which is just still within the normal range, or 17,7 (-20% of body weight), which is below the normal range.
For a man aged 25 to 50 years, with an average height of 1,76 metres, a normal body weight with a healthy BMI of 23 would be 71 kg. Reductions of -15% and -20% of body weight would reduce our standard man's weight to 60 kg and 57 kg, with BMIs of 19,4 and 18,4 respectively.
Studies show that underweight patients of all ages face a 1.8 times greater risk for dying than patients with a normal BMI.
Recommended Forever Living Products for People with Underweight
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