It's notoriously difficult to lose weight. Researchers may have uncovered at least some answers as to why efforts to lose weight are often less successful for those with lower incomes.

Shifting female hormones can affect wellness and disease alike. Breast cancer, a disease influenced by hormones, also may be affected by women’s body size.

Health advocates worldwide have aimed to cut rates of heart disease and the disorders that trigger it. After a half-century of documented progress on that front, Canadian researchers project a change in the root causes of heart disease in that nation.

Despite trends of people exercising more and having better access to healthy foods, obesity is still a growing and widespread problem in the United States.

Some people have genes that make them more likely to develop type 2 diabetes. Weight loss, however, may be the most effective way to lower diabetes risk, regardless of genetic risk.

Kids who don't get enough sleep might drive their parents crazy sometimes, but there could be more at stake. Kids' waistlines could suffer too.

Some of the biggest killers worldwide are diseases that can largely be prevented: heart disease, chronic respiratory disease, cancers and diabetes. But it will require some effort.

Obesity has become a problem among Americans of all ages, including young adults. If these young obese people don't lose weight, they could be putting themselves at risk for a host of health problems as the years go by. 

Non-alcoholic fatty liver disease is a growing problem in the United States as obesity rates continue to grow. Now, researchers think they have found a great way to treat this liver condition.

A person's weight may influence how accurate various medical tests are. When the test is looking for whether breast cancer has spread, it's important to know if weight makes a difference.