Diet & Weight Loss Archive

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Newer medications, which may be safer than earlier drugs, have expanded the options for treating obesity.

Obesity is now considered more than a risk factor for other conditions; it's a disease itself. It has been the subject of intense scientific and medical research to develop effective treatments. But the quest has been elusive.

News briefs

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Here's a simple way to try to control your weight: take more time to eat your meal. It's one of several strategies that appeared to help people in a study published online Feb. 12, 2018, by BMJ Open. Researchers analyzed about six years' worth of health insurance claims and doctor visit details for 60,000 Japanese men and women with type 2 diabetes. The doctor visits included questions about how quickly people ate their meals. People who ate slowly were 42% less likely to be obese than people who gulped down their food. The study was only observational and therefore can't prove that eating slowly caused weight loss, but other studies have reported similar findings. Also, it takes about 15 minutes after you start to eat for the "getting full" signals to reach your brain — and a person can eat a lot of calories in 15 minutes. So slow down and savor every bite. For more information, check out the Harvard Special Health Report 6-Week Plan for Healthy Eating (www.health.harvard.edu/swp).

News briefs

Prepackaged, processed foods are typically high in fat, salt, and sugar. If that's not enough to make you put down a cookie or resist a frozen dinner, consider an observational study published online Feb. 14, 2018, by The BMJ. It analyzed dietary questionnaire answers of 105,000 middle-aged men and women in France for five years. Foods were grouped according to degree of processing — that is, the amount of change the ingredients go through as food makers improve flavor, coloring, and shelf life. For example, dehydrated soups, baked goods, sugary cereals, processed meats, biscuits, and sauces were considered ultra-processed foods. Less processed foods included canned vegetables, cheeses, and freshly made unpackaged bread. Every 10% increase in consumption of ultra-processed foods was associated with a 12% higher risk for cancer in general and an 11% increased risk for breast cancer. No significant link was found to prostate or colorectal cancer. The study doesn't prove that ultra-processed foods cause cancer, but researchers say the cumulative effects of food additives remain largely unknown.

In the journals

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People who make an effort to lose weight can help their partner do the same, according to a study published online Feb. 1, 2018, by Obesity.

The study tracked the weight-loss progress of 130 couples over six months. The couples were divided into two groups. In one group, one member of the couple was enrolled in a Weight Watchers program that provided in-person counseling and online tools to assist with weight loss. In the second group, one member of the couple received a four-page handout with information on ways to lose weight, like healthy eating, exercise, and weight-control strategies.

Research we're watching

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If your food is more likely to come out of a bag or a box than from a tree or the ground, you may be putting yourself at higher risk for cancer. A study published online Feb. 14, 2018, by The BMJ found that people who eat more ultra-processed foods have a higher overall risk of cancer than those who don't. In fact, when the proportion of ultra-processed foods in a person's diet increased by 10%, the risk of cancers increased by more than 10%.

The researchers came to their conclusions after reviewing data from more than 100,000 people, on average 42 years old, based on their usual consumption of 3,300 different foods. The foods were classified according to their level of processing. Ultra-processed foods included things like

Research we're watching

For people with atrial fibrillation, losing a little weight and getting exercise may improve their symptoms, according to a review published online Feb. 7, 2018, by The American Journal of Cardiology.

Atrial fibrillation (or afib) is a common heart rhythm disorder marked by a quivering or fluttering heartbeat, which can cause dizziness and breathlessness. Other symptoms include fatigue, weakness, and fainting.

Ask the doctor

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Q. I'm an 87-year-old man. Over the past year I've lost considerable weight, and I didn't have that much to lose. My doctor can't find any reason for my weight loss and is advising me to eat ice cream. But isn't that risky for my heart?

A. I smiled when I read your letter, because I've occasionally said that if I were to develop a terminal condition, the silver lining on that cloud would be that I could finally eat all the hot fudge sundaes I wanted.

As a person loses weight, the body reacts by lowering its metabolic rate to conserve energy, an evolutionary adaptation that makes it harder to lose additional weight. A study of participants from The Biggest Loser found that this metabolic adjustment persists for years.

News briefs

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Past studies have suggested that drinking coffee is associated with many health benefits, such as added longevity, lower blood pressure, less weight gain with aging, and a reduced risk of many diseases, including type 2 diabetes, liver disease, cardiovascular disease, several degenerative neurological diseases (like Parkinson's disease), and cancer. Now a massive review of more than 200 large studies, published Nov. 22, 2017, in The BMJ, backs up many of those links. The largest health benefits were associated with drinking three to four cups of coffee per day: drinking more than four cups per day did not bring additional benefits. It's not all good news, however; the study found that women who drank coffee had greater risks for fracture and pregnancy complications. But over all, the researchers say, coffee drinking appears to be safe. They caution that the findings are all based on observational studies, not randomized controlled trials — the gold standard of research.

Drinking a few cups a day seems to be safe for most people. But evidence that coffee protects your heart is pretty weak.

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Java junkies may have perked up after hearing that drinking coffee may lower heart disease risk. But are there grounds to support this claim?

In recent years, researchers have observed that people who drink about three cups of coffee daily may be slightly less likely to develop heart disease or to die from it than people who avoid the aromatic brew. A review article in the Nov. 22, 2017, issue of The BMJ that included nearly 300 studies on the health effects of coffee came to a similar conclusion. However, as the authors point out, their findings can't prove cause and effect. In the absence of long-term, randomized trials that assign people to drink coffee or not, it's impossible to say whether the popular drink (or some other factor) led to the lower heart risk.