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If your budget isnt up to a tropical vacation this summer, you can at least take your tastebuds to the tropics with some nutrition-packed choices in the fruit section. Tropical fruits such as guava, kiwifruit, mango and papaya are low-calorie, nutrient-dense options for adding variety to your menus. Although most tropical fruits are now available year-round, several of these are at their peak (and also most affordable) in summer or early fall.

Nobody questions the health benefits of even just a little exercise, but you may wonder about what might be called the Goldilocks question: How much physical activity is just right? And is it possible to get too much or to overdo the intensity? Two large new studies, both published in JAMA Internal Medicine, attempt to answer such questions and identify the sweet spot of the ideal amount of exercise.

Not since the TV-cartoon heyday of Fred Flintsones modern Stone Age family have cavemen been so in vogue. The Paleo Diet, a book by Loren Cordain, PhD, has been a bestseller since it was first published in 2002, and it has spawned a pile of cookbooks and a glossy magazine devoted to modern day primal living. A Google search for Paleo diet retrieves 7.7 million hits. Actor Chris Pratt credits the Paleo diet for getting him in shape to star as the buff hero in the Guardians of the Galaxy movie.

Americans consume more than $7 billion a year worth of yogurt, with hundreds of new yogurt products introduced annually. In survey after survey, consumers say the healthfulness of yogurt is top among the reasons they eat it.

If you grew up thinking of nuts as a not-very-good-for-you indulgence, theres a growing pile of evidence that should change your mind about these healthy foods. For a long time, consumers thought that coffee raises blood pressure, eggs cause heart disease, chocolate is an unhealthy treat, and nuts make you fat, says Jeffrey Blumberg, PhD, director of Tufts HNRCA Antioxidants Research Laboratory. However, such conclusions were often based on very little science and several mistaken assumptions. The latest news in nuts rehabilitation comes from two studies spotlighting the heart-health benefits of almonds and peanuts.

Surveys have shown that a large majority of Americans are confident in the safety, quality and effectiveness of products marketed as dietary supplements (a term derived from a 1994 law that questionably grouped drug-type herbal and botanical extracts with essential vitamins and minerals). So many were shocked at the recent news that four out of five popular herbal remedies sold at some of the nations leading retailers didnt contain any of the promised ingredients. The investigation by the New York State attorney generals office charged GNC, Target, Walgreens and Walmart with selling fraudulent and potentially dangerous products and demanded the products be yanked from store shelves.

With the domestic blueberry season about to begin, theres no better time to celebrate the bountiful health benefits of Americans second-favorite berry (after strawberries). New research has linked blueberry consumption to better blood pressure, and Tufts scientists continue to explore how blueberries protect the brain. More than three-dozen current clinical trials are testing blueberries possible benefits for vision, gout protection, arterial function, blood sugar and more.

Concerns about carcinogens in roasted nuts centers on acrylamide, a compound formed when certain plant foods are cooked at temperatures above 250 degrees, especially by frying, baking, broiling or roasting for long cooking times. Cooking causes a chemical reaction between sugars in the food and an amino acid called asparagine, which in turn forms acrylamide. Among the foods most noted for producing acrylamide are potatoes, leading to concerns about French fries and potato chips.

Take a look in your pantry. Do you see whole-grain pasta? Does the label on your bread say 100% whole wheat? (Are you sure? Dont be fooled by terms like multigrain.) Is your breakfast cereal made with whole grains?We are very fortunate these days-for almost any type of baked product there is a whole-grain option that one can choose in place of the refined-grain option, says Alice H. Lichtenstein, DSc, director of Tufts HNRCA Cardiovascular Nutrition Laboratory. Just be careful; dont try to judge whether something is made from whole grain by its color. It is important to read the label the first time, just to make certain. Some light-colored products are made with white whole grains and some dark-colored products are not and just appear so because caramel or other coloring was added.

If youre looking for motivation to get up off the couch, the results of a large new European study may be just what you need to lace up those walking shoes. Even a moderate amount of exercise-the equivalent of a daily brisk 20-minute walk-was associated with significant reductions in mortality risk. Physical activity contributed to longevity independently of weight loss, and the biggest potential benefits were seen simply by going from completely sedentary to moderately inactive.