Nutrition Archive

Feeling dazed and confused in the yogurt aisle? Here's some information to help you make good choices.

Yogurt used to be pretty straightforward. It came in small, simple containers, with a swirl of fruit on the bottom if you were lucky. Not anymore. Today there's Greek yogurt, shakes, and tasty-looking cups with sprinkles and crushed cookies. Yogurt is blended into smoothies and squirted into portable tubes and pouches. Over in the ice cream aisle, there are even more options, with a variety of frozen yogurt products in tubs and handheld popsicles.

This gives you lots of choices but might also leave you wondering which one to pick. At the root of the dilemma is this question: is yogurt a health food or a dessert? The truth is, today's yogurt can be either, depending on the type you choose. This means you've got to do a little detective work to figure it out.

In the journals

Certain foods may trigger inflammation in the body that can increase a person's risk for colon cancer, suggests a study published online Jan. 18, 2018, by JAMA Oncology.

Researchers followed the diets of more than 121,000 people (46,800 of whom were men) for 26 years. Participants recorded what they ate, and their diets were scored based on the amount of foods consumed that are linked to inflammation, such as red and processed meats, sugary beverages, and refined grains.

For people with inflammatory bowel disease (IBD), knowing which foods to eat and which to avoid is important information. An international organization has developed guidelines for some kinds of food, with the aim of helping people with this condition reduce symptoms and inflammation.

Research we're watching

Sipping a cup of tea at least every other day or so may be good for your heart, according to a study published online January 9 by the European Journal of Preventive Cardiology.

The study included data from more than 100,000 Chinese adults who were part of a long-term health study. The participants provided health and behavioral information, including how much tea they drank. The follow-up lasted an average of seven years.

Here's what the numbers mean — and strategies to lower your cholesterol if it's too high.

For some women who've had normal cholesterol readings all their lives, that changes at menopause. "Going through menopause often results in lipid and cholesterol changes for the worse," says Dr. Samia Mora, an associate professor of medicine at Harvard Medical School and a specialist in cardiovascular medicine the Brigham and Women's Hospital. Drops in the female hormone, estrogen, are associated with a rise in total cholesterol levels due to higher amounts of low-density lipoprotein (LDL), the "bad" cholesterol, and another blood lipid (fat) known as triglyceride. Over time this can raise heart risks, which is a reason for concern, as cardiovascular disease is the No. 1 cause of death in postmenopausal women, says Dr. Mora.

"So, it's especially important to track the numbers in perimenopause and the early years after menopause, as LDL cholesterol and total cholesterol tend to increase," she says.

Ask the doctor

Q. You recommend eating fish twice a week. However, I've read that fish contain toxins and microplastics. Is it really safe to eat fish?

A. Most options in life contain both benefits and risks. Foods are no exception. Eating fish has potential benefits (largely from the omega-3 fats they contain) and risks (from the toxins). Do the benefits exceed the risks? That question has been addressed by research — much of it by colleagues here at Harvard. The answers are different for different people, and for different types of fish.

Research we're watching

People may let healthy eating and exercise habits slide after starting prescription heart medications, according to a study in the February 18 Journal of the American Heart Association.

The study involved more than 40,000 Finnish people whose average age was 52. From 2000 to 2013, researchers surveyed them at least twice every four years about their body mass index and their exercise, smoking, and drinking habits. They used pharmacy records to track if the participants began taking blood pressure drugs or statins.

This caregiver role has mental and physical health challenges.

You're not alone if you've suddenly found yourself raising your grandchildren. In the United States, three million older adults are primary caregivers to kids of all ages. Like any caregiver role, raising kids (especially young children) comes with many challenges, not the least of which is maintaining your health.

Physical challenges

The care of little kids — feeding, bathing, dressing, soothing, entertaining, lifting, carrying, and chasing after them — requires youthful energy and strength. As a grandparent you may be at a disadvantage, and not just because of age. "You may be slower from chronic conditions — like arthritis, heart problems, or diabetes — and from taking the medications needed to treat them," says Dr. Suzanne Salamon, associate chief of gerontology at Harvard-affiliated Beth Israel Deaconess Medical Center.

On call

Q. Can specific types of supplements help reduce my risk of developing prostate cancer?

A. Most studies of vitamin and mineral supplements have had disappointing results. In fact, some even appear to increase prostate cancer risk. Here's a rundown on where everything stands.