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Body Weight
URL of this page: https://medlineplus.gov/bodyweight.html

Body Weight

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Basics

  • Summary
  • Start Here

Learn More

  • Related Issues
  • Specifics

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Research

  • Statistics and Research
  • Clinical Trials
  • Journal Articles

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Summary

Do you know if your current weight is healthy? "Underweight", "normal", "overweight", and "obese" are all labels for ranges of weight. Obese and overweight mean that your weight is greater than it should be for your health. Underweight means that it is lower than it should be for your health. Your healthy body weight depends on your sex and height. For children, it also depends on your age.

A sudden, unexpected change in weight can be a sign of a medical problem. Causes for sudden weight loss can include:

  • Thyroid problems
  • Cancer
  • Infectious diseases
  • Digestive diseases
  • Certain medicines

Sudden weight gain can be due to medicines, thyroid problems, heart failure, and kidney disease.

Good nutrition and exercise can help in losing weight. Eating extra calories within a well-balanced diet and treating any underlying medical problems can help to add weight.

Start Here

  • About Body Mass Index (BMI) (Centers for Disease Control and Prevention) Also in Spanish
  • Assessing Your Weight and Health Risk From the National Institutes of Health (National Heart, Lung, and Blood Institute)

Related Issues

  • Antidepressants and Weight Gain: What Causes It? (Mayo Foundation for Medical Education and Research) Also in Spanish
  • Beta Blockers: Do They Cause Weight Gain? (Mayo Foundation for Medical Education and Research) Also in Spanish
  • Body Image and Mental Health (Department of Health and Human Services, Office on Women's Health) Also in Spanish
  • Thyroid and Weight (American Thyroid Association) Also in Spanish

Specifics

  • BMI Frequently Asked Questions (Centers for Disease Control and Prevention) Also in Spanish
  • Health Risks of Overweight and Obesity From the National Institutes of Health (National Institute of Diabetes and Digestive and Kidney Diseases) Also in Spanish
  • Tips for Maintaining Healthy Weight (Centers for Disease Control and Prevention)
  • Unexplained Weight Loss (Mayo Foundation for Medical Education and Research) Also in Spanish

Health Check Tools

  • new Adult BMI Calculator (Centers for Disease Control and Prevention)
  • Calculate Your BMI From the National Institutes of Health (National Heart, Lung, and Blood Institute) Also in Spanish

Statistics and Research

  • FastStats: Obesity and Overweight (National Center for Health Statistics)
  • Overweight and Obesity Statistics From the National Institutes of Health (National Institute of Diabetes and Digestive and Kidney Diseases)

Clinical Trials

  • ClinicalTrials.gov: Body Mass Index From the National Institutes of Health (National Institutes of Health)
  • ClinicalTrials.gov: Body Weight From the National Institutes of Health (National Institutes of Health)
  • ClinicalTrials.gov: Body Weight Changes From the National Institutes of Health (National Institutes of Health)
  • ClinicalTrials.gov: Obesity From the National Institutes of Health (National Institutes of Health)
  • ClinicalTrials.gov: Thinness From the National Institutes of Health (National Institutes of Health)

Journal Articles References and abstracts from MEDLINE/PubMed (National Library of Medicine)

  • Article: Inadequate lumbar protection with load weight limits based on body weight...
  • Article: Eating in the absence of hunger is not associated with weight,...
  • Article: Intermittent fasting strategies and their effects on body weight and other...
  • Body Weight -- see more articles

Find an Expert

  • Find a Nutrition Expert (Academy of Nutrition and Dietetics)
  • National Institute of Diabetes and Digestive and Kidney Diseases From the National Institutes of Health

Children

  • Birth Weight: MedlinePlus Health Topic From the National Institutes of Health (National Library of Medicine) Also in Spanish
  • Child and Teen BMI Categories (Centers for Disease Control and Prevention) Also in Spanish
  • Overweight and Obesity (For Parents) (Nemours Foundation) Also in Spanish
  • What Being Overweight Means (For Kids) (Nemours Foundation) Also in Spanish

Teenagers

  • Staying at a Healthy Weight (For Teens) (Nemours Foundation)
  • What's the Right Weight for My Height? (For Teens) (Nemours Foundation) Also in Spanish

Older Adults

  • Healthy Lifestyles for Healthy Older Adults (Academy of Nutrition and Dietetics)

Patient Handouts

  • Body mass index (Medical Encyclopedia) Also in Spanish
  • Growth chart (Medical Encyclopedia) Also in Spanish
  • Overweight (Medical Encyclopedia) Also in Spanish
  • Weight gain - unintentional (Medical Encyclopedia) Also in Spanish
  • Weight loss - unintentional (Medical Encyclopedia) Also in Spanish

Topic Image

Body Weight

MEDICAL ENCYCLOPEDIA

  • Body mass index
  • Growth chart
  • Overweight
  • Weight gain - unintentional
  • Weight loss - unintentional

Related Health Topics

  • Malnutrition
  • Obesity
  • Obesity in Children
  • Weight Control

National Institutes of Health

The primary NIH organization for research on Body Weight is the National Heart, Lung, and Blood Institute

Other Languages

Find health information in languages other than English on Body Weight

Disclaimers

MedlinePlus links to health information from the National Institutes of Health and other federal government agencies. MedlinePlus also links to health information from non-government Web sites. See our disclaimer about external links and our quality guidelines.

The information on this site should not be used as a substitute for professional medical care or advice. Contact a health care provider if you have questions about your health.

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