June 4th, 2014
12:01 PM ET
"Eat breakfast!" nutrition experts have been telling us for decades. It revs your metabolism! It keeps you from overindulging at lunch! It helps you lose weight!
But a new study suggests the "most important meal of the day" may not be so important - at least for adults trying to lose weight.
Published Wednesday in the American Journal of Clinical Nutrition, the study found dieters who skipped breakfast lost just as much weight as dieters who ate breakfast regularly. The researchers concluded that while breakfast may have several health benefits, weight loss isn't one of them.
May 16th, 2014
10:29 AM ET
Scientists know obese people have an increased risk of getting several types of cancer. But a new study suggests being obese also increases the chance that some patients' cancers will come back, and increases the likelihood that those patients will die from cancer.
The study was released in advance of the 2014 American Society of Clinical Oncology annual meeting, which begins on May 30.
Researchers looked at 80,000 patients in 70 early breast cancer trials and analyzed their body mass index, estrogen receptor, menopause status, cancer recurrence and their prognosis.
They compared women with higher BMIs (over 30) to those with normal BMIs (20-25) over a 10-year period. They found for younger, pre-menopausal women who have early breast cancer, obesity appears to be strongly linked to worse outcomes, including death.
May 15th, 2014
06:01 PM ET
Editor's note: This blog was originally published in June 2013 when the research was presented at the American Diabetes Association Scientific Sessions in Chicago. The final study results were published Thursday in the journal Diabetologia.
You've probably heard that eating multiple small meals throughout the day is a good way to stave off hunger and keep your metabolism revved up while trying to lose weight. But a new study could change your diet strategy.
Eating two large meals early and skipping dinner may lead to more weight loss than eating six smaller meals throughout the day, the study suggests.
"Both experimental and human studies strongly support the positive effects of intermittent fasting," lead study author Dr. Hana Kahleova told CNN in an e-mail.
April 15th, 2014
04:58 PM ET
Pregnant women who are obese or overweight have an increased risk of delivering a stillborn baby, according to a new study published Tuesday in the Journal of the American Medical Association.
Researchers looked at 38 studies to better understand the potential risks to an unborn child in relation to its mother's body mass index. They found even a modest increase in an obese pregnant woman's weight is linked to an increased risk of fetal death, stillbirth and infant death.
The highest risk was in women with a BMI over 40 (30 is considered obese). These women were two to three times more likely to experience complications. Even women with a BMI over 25 (which is considered overweight) were found to experience increased complications. FULL POST
April 7th, 2014
04:01 PM ET
The researchers looked at data from more than 26,000 children age 2 to 19 in the United States who participated in the National Health and Nutrition Examination Survey. They found that rates of overweight and obese children have been trending upward since 1999, with significant increases seen recently in the number of severely obese children.
Severe childhood obesity rates have more than doubled since 1999, according to the study. In 1999-2000, less than 1% of children fell into the Class 3 obesity category - meaning they had a body mass index 140% higher than their peers. In 2011-2012, 2.1% of children were in the same category. An additional 5.9% met the criteria for Class 2 obesity.
January 30th, 2014
10:49 AM ET
The baby fat lingering around your 5-year-old's face (and tummy and thighs) may be an indicator of his or her weight for many years to come, a new study suggests. Children who enter kindergarten overweight are four times more likely than their normal weight peers to become obese by age 14, researchers say.
Though recent studies have shown signs of progress in the fight against childhood obesity, an estimated one out of every eight preschoolers in the United States is obese, according to the Centers for Disease Control and Prevention. The numbers are higher in African-American and Hispanic populations, at one in five and one in six, respectively.
The new study, published Thursday in the New England Journal of Medicine, suggests a big part of a child's obesity risk is already established by age 5. Interventions to combat childhood obesity may need to focus on those children who are overweight early in life, the study authors say.
December 3rd, 2013
03:04 PM ET
You've probably heard someone say, "I'm fat but fit." Several recent studies have suggested this statement could be true. But a new review of existing studies published this week in the Annals of Internal Medicine may put a stop to the rumor.
"Healthy obesity" is just a myth, the study authors say.
Scientists know that overweight people can be what they call "metabolically healthy." This means that despite having a high body mass index, or BMI, someone can have a small waistline, normal blood pressure and low cholesterol levels, and show little to no risk for developing diabetes. The opposite is also true; thin people can be metabolically unhealthy, with high blood pressure, high cholesterol and fat that accumulates only around their middle, which is a known risk for heart disease.
This kind of paradox highlights "the complexity of the relationship between weight and mortality," the authors of this new meta-analysis write. A lot of factors impact a person's cardiovascular health, including how much they exercise and when they put on the weight.
September 16th, 2013
01:46 PM ET
Efforts to increase healthy habits in American teens may be making an impact, according to a new study. Adolescents are moving more, eating better and watching less TV than they used to, and researchers say obesity rates in this group may finally be stabilizing.
The study results come a little more than a month after the Centers for Disease Control and Prevention announced it was seeing signs of progress in the fight against childhood obesity, especially in low-income families.
In the new study, published Monday in the journal Pediatrics, researchers analyzed data from three sets of students in grades 6 to 10. One set was surveyed during the 2001-2002 school year, another set during the 2005-2006 school year and the third set from the 2009-2010 school year. Researchers asked the students about their daily physical activity, nutrition, breakfast consumption, TV habits, and height and weight. They then compared the answers across the three school years to identify trends in healthy - or unhealthy - behaviors.
August 15th, 2013
04:01 PM ET
Just days after the Centers for Disease Control and Prevention released statistics showing promise in the fight against childhood obesity, another study suggests the American public health system shouldn't be celebrating quite yet.
While new statistics show childhood obesity rates in the United States are dropping, obesity in adults still accounts for 18% of deaths among black or white Americans between ages 40 and 85, according to a study published this week in the American Journal of Public Health. Researchers say that's approximately 1 in 5 black or white Americans who are dying from illnesses related to obesity.
Even though the statistics may not surprise those who work in public health, they are nearly three times higher than previous estimates, according to study authors. FULL POST
August 6th, 2013
12:01 PM ET
After decades of warnings about the rapidly rising rate of childhood obesity, the Centers for Disease Control and Prevention has some good news. A new report from the CDC suggests we've made some progress in the fight against childhood obesity in the nation's youngest children - specifically those from low-income families.
Researchers analyzed data from approximately 12 million children between the ages of 2 and 4 who participate in federally funded nutrition programs. Data from 40 states, Washington, the U.S. Virgin Islands and Puerto Rico were included in the Vital Signs report.
Nineteen of the states and the U.S. Virgin Islands saw a small but significant decline in preschoolers' obesity rates between 2008 and 2011, according to the CDC. Three states - Colorado, Pennsylvania and Tennessee - saw a slight increase over the same time period, and the rest remained stagnant. Utah, Wyoming, Louisiana, Texas, Maine, Delaware, Alaska, Oklahoma, Virginia and South Carolina were not included in the report due to inconsistencies or changes in data reporting.
"It's a bright spot for our nation's young kids, but the fight is very far from over," CDC Director Dr. Tom Frieden said.
About this blog
Get a behind-the-scenes look at the latest stories from CNN Chief Medical Correspondent, Dr. Sanjay Gupta, Senior Medical Correspondent Elizabeth Cohen and the CNN Medical Unit producers. They'll share news and views on health and medical trends - info that will help you take better care of yourself and the people you love.