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Ask the Experts

Q. Do people who do not have a gluten sensitivity benefit from reducing or...

A. Alice H. Lichtenstein, DSc, a nutrition professor at the Friedman School and executive editor of Tufts Health & Nutrition Letter, answers: “The short answer is no. “Gluten is a protein found in wheat, barley, and rye. In people with the autoimmune condition celiac disease, gluten damages the lining of the intestines, leading to malabsorption […]
Calorie counting

Q. I find it difficult and off-putting to calculate the calories in all the...

A. Dariush Mozaffarian, MD, DrPH, dean of the Friedman School of Nutrition Science and Policy and editor-in-chief of Tufts Health & Nutrition Letter answers: “Counting calories is not necessary, and, I believe, not desirable when trying to lose weight. Calories of course matter, but the number of calories we ultimately eat—and burn—is influenced long-term by […]

Q. Some dietary advice treats corn as a starch, but some says it’s a...

A. Helen Rasmussen, PhD, RD, FADA, LDN, a research dietitian at the HNRCA, answers: “There is a lot of confusion about where corn should fit in your dietary pattern, and for good reason. In the Dietary Guidelines for Americans, corn is classified as both a vegetable and a grain. Botanically, it’s actually a fruit! All […]
Water bottle

Q. Does the amount of deuterium in drinking water matter to one’s health?

A. Judith C. Thalheimer, RD, LDN, managing editor of Tufts Health & Nutrition Letter, answers: “Deuterium is a naturally-occurring isotope of hydrogen. Most hydrogen atoms have one proton and no neutrons. When a hydrogen atom does contain a neutron, it is called deuterium. Deuterium is also known as heavy hydrogen. Since water is made up […]

Q. I have a normal BMI, I eat right, and I stay quite active...

A. Alice H. Lichtenstein, DSC, director of the Cardiovascular Nutrition Laboratory and executive editor of Tufts Health & Nutrition Letter, answers: “A large waist (over 35 inches for women and 40 inches for men) is one of the components of metabolic syndrome, a cluster of conditions that increases risk for heart attack, stroke, and type […]

Q. I have been told I shouldn’t eat nuts because of my diverticulosis. Is...

A. Alicia Romano, MS, RD, a dietitian at the Frances Stern Nutrition Center, answers: “Nuts are healthy foods that are good choices to incorporate into your diet for the long term, given their general healthy nutrient profile. They are a plant source of protein and naturally high in fiber and healthy fats (omega-3 and polyunsaturated […]

Q. Should I buy white peaches/nectarines, or yellow? Are purple and yellow carrots a...

A. Jeffrey B. Blumberg, PhD, a professor at the Friedman School and an expert on dietary bioactive components, answers: “The color of a plant food is a clue to which health-promoting phytochemicals it contains: ➧ Blue and purple (e.g.: blueberries, plums, black beans, eggplant) indicates the presence of anthocyanins ➧ Green colors (e.g.: asparagus, broccoli, […]

Nutrition Lessons from a Global Pandemic:

Here at Tufts Health & Nutrition Letter we strive to provide you with the latest, science-based health and nutrition information to help contribute to your health and well-being. The COVID-19 pandemic has confirmed that much work remains to be done. According to an analysis of U.S. deaths from February and March of 2020, 78 percent […]
Peppermint Oil

Q. Can peppermint oil help my irritable bowel syndrome?

A. Judith C. Thalheimer, RD, LDN, managing editor of Tufts Health & Nutrition Letter, answers: While a handful of small studies suggested that peppermint oil capsules may help lessen abdominal pain in people with irritable bowel syndrome (IBS), the results of a larger randomized controlled trial do not agree. The study, published in 2019 in […]

Q. Is it true that percentage intake of macronutrients (protein, CHO, fat) should be...

A. Lauren McAvoy, a dietetic intern at Tufts Medical Center, answers: “While there are claims that individuals with different body types metabolize nutrients differently, there is currently no scientific evidence to support this concept. An individual’s fat distribution, specifically around the midsection, is associate with certain health outcomes. For example, individuals with an ‘apple’ shaped […]