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Body mass index, or BMI, is used to evaluate body fatness. A BMI of 18.5 to 24.9 is considered normal for an adult. A higher number indicates an increased level of fatness, with a BMI of 25.0 to 29.9 considered overweight. A BMI of 30.0 or more is considered obese. BMI calculation is affected by a person's age, race, gender and muscle mass, so these factors should be considered in the overall assessment. The calculation becomes more and more valid as a person's BMI increases.
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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.