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Body Mass Index

What is BMI?

BMI (body mass index) is a formula used to assess a person's body weight in relation to height. It's an indirect measure of body composition and it correlates highly with body fat in most people. Weight (in kilograms) is divided by height (in meters) squared (kg/m2).  The general guidelines for BMI values are as follows:

  • Less than 18.5 is considered underweight.
  • 18.5 to 24.9 is considered healthy.
  • 25.0 to 29.9 is considered overweight.
  • 30.0 or greater is considered Obese.
  • 40.0 + is considered extreme obesity.


People with dense muscle mass may have a high BMI score but very little body fat.  See the American Heart Association for more information. 

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Neither nor the authors of this publication assume any liability for the information contained herein. The Information contained herein reflects only the opinion of the author and is in no way to be considered medical advice. Specific medical advice should be obtained from a licensed health care practitioner. Consult your physician before you begin any nutrition, exercise, or dietary supplement program.

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