Explore Overweight and Obesity
Being overweight or obese isn't a cosmetic problem. These conditions greatly raise your risk for other health problems.
As your body mass index rises, so does your risk for coronary heart disease (CHD). CHD is a condition in which a waxy substance called plaque (plak) builds up inside the coronary arteries. These arteries supply oxygen-rich blood to your heart.
Obesity also can lead to heart failure. This is a serious condition in which your heart can't pump enough blood to meet your body's needs.
Blood pressure is the force of blood pushing against the walls of the arteries as the heart pumps blood. If this pressure rises and stays high over time, it can damage the body in many ways.
Your chances of having high blood pressure are greater if you're overweight or obese.
Being overweight or obese can lead to a buildup of plaque in your arteries. Eventually, an area of plaque can rupture, causing a blood clot to form.
If the clot is close to your brain, it can block the flow of blood and oxygen to your brain and cause a stroke. The risk of having a stroke rises as BMI increases.
Diabetes is a disease in which the body's blood glucose, or blood sugar, level is too high. Normally, the body breaks down food into glucose and then carries it to cells throughout the body. The cells use a hormone called insulin to turn the glucose into energy.
In type 2 diabetes, the body's cells don't use insulin properly. At first, the body reacts by making more insulin. Over time, however, the body can't make enough insulin to control its blood sugar level.
Diabetes is a leading cause of early death, CHD, stroke, kidney disease, and blindness. Most people who have type 2 diabetes are overweight.
If you're overweight or obese, you're at increased risk of having abnormal levels of blood fats. These include high levels of triglycerides and LDL ("bad") cholesterol and low levels of HDL ("good") cholesterol.
Abnormal levels of these blood fats are a risk factor for CHD. For more information about triglycerides and LDL and HDL cholesterol, go to the Health Topics High Blood Cholesterol article.
Metabolic syndrome is the name for a group of risk factors that raises your risk for heart disease and other health problems, such as diabetes and stroke.
You can develop any one of these risk factors by itself, but they tend to occur together. A diagnosis of metabolic syndrome is made if you have at least three of the following risk factors:
Being overweight or obese raises your risk for colon, breast, endometrial, and gallbladder cancers.
Osteoarthritis is a common joint problem of the knees, hips, and lower back. The condition occurs if the tissue that protects the joints wears away. Extra weight can put more pressure and wear on joints, causing pain.
Sleep apnea is a common disorder in which you have one or more pauses in breathing or shallow breaths while you sleep.
A person who has sleep apnea may have more fat stored around the neck. This can narrow the airway, making it hard to breathe.
Obesity hypoventilation syndrome (OHS) is a breathing disorder that affects some obese people. In OHS, poor breathing results in too much carbon dioxide (hypoventilation) and too little oxygen in the blood (hypoxemia).
OHS can lead to serious health problems and may even cause death.
Obesity can cause menstrual issues and infertility in women.
Gallstones are hard pieces of stone-like material that form in the gallbladder. They're mostly made of cholesterol. Gallstones can cause stomach or back pain.
People who are overweight or obese are at increased risk of having gallstones. Also, being overweight may result in an enlarged gallbladder that doesn't work well.
Overweight and obesity also increase the health risks for children and teens. Type 2 diabetes once was rare in American children, but an increasing number of children are developing the disease.
Also, overweight children are more likely to become overweight or obese as adults, with the same disease risks.
Obesity happens one pound at a time. So does prevention.
Clinical trials are research studies that explore whether a medical strategy, treatment, or device is safe and effective for humans. To find clinical trials that are currently underway for Overweight and Obesity, visit www.clinicaltrials.gov.
November 8, 2013
NIH and the Children's Museum of Manhattan launch innovative program to help families create healthier futures
Through an innovative public-private partnership, the National Institutes of Health and the Children's Museum of Manhattan (CMOM) have created a new health educational curriculum — EatPlayGrow: Creative Activities for a Healthy Start — for children ages 2-5 and their parents
Hear people talk about their challenges and successes reaching and maintaining a healthy weight on the HBO Documentary Films series, “The Weight of the Nation,” which premiered in May 2012.
The film series spotlights the science behind obesity and how it affects the health of the nation. Watch the series to learn how citizens, groups, and policymakers are working to make a difference in their communities. The films stream free on the HBO Web site.
To learn more about the film series and related public awareness campaign, including how to host a local screening go to www.nih.gov/health/
August 19, 2014
Gary H. Gibbons
Why Do Fruit Flies Take Naps? NHLBI Investigator Studies Connections Between Sleep Patterns and Gene Networks in Fruit F
The NHLBI updates Health Topics articles on a biennial cycle based on a thorough review of research findings and new literature. The articles also are updated as needed if important new research is published. The date on each Health Topics article reflects when the content was originally posted or last revised.