Ask the Experts

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 […]
Corn

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 […]
Colon

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...
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...
macronutrients

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,...
Food Expiration

Q. Do I need to throw out food as soon as the printed expiration...

A. Judith C. Thalheimer, RDN, LDN, managing editor of Tufts Health & Nutrition Letter, answers: “Those ‘sell by’ and ‘best by’ dates on packages...