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If youre eating a balanced diet and have no special health concerns, you probably dont need extra vitamin A of any kind. According to the Office of Dietary Supplements of the National Institutes of Health, Vitamin A is available in multivitamins and as a stand-alone supplement, often in the form of retinyl acetate or retinyl palmitate [preformed vitamin A].

With some 50 million Americans afflicted by arthritis, chances are that even if you dont suffer from the disease, your spouse or someone else close to you does. But theres hope for this painful condition. Arthritis patients have a range of medications available, and today most know the benefits of exercise for improving their condition. While once arthritis sufferers were told rest is best, research at Tufts and elsewhere has shown that strength training in particular can help prevent and reduce arthritis symptoms.

Nuts are among the oldest human foods, with records of eating pistachios dating back to the Stone Age. You might describe the Stone Age as the time of discovery of the first trail mix, says Jeffrey Blumberg, PhD, director of Tufts HNRCA Antioxidants Research Laboratory. Prehistoric nomads mixed ground almonds and pistachios with chopped dates, sesame oil and breadcrumbs. Its also interesting that almonds were found in Tutankhamens tomb in Egypt.

As a reader of this newsletter, you know that the Mediterranean diet has been associated with a wide range of health benefits. Most recently, weve reported on findings from the Spanish PREDIMED study linking such a diet to reduced risk of heart disease (June 2013) and cognitive decline (August 2013). Other studies have suggested preventive benefits against certain cancers, diabetes, Parkinsons disease and depression. The Dietary Guidelines for Americans recommends the Mediterranean diet as one…

Over and over again, youve read in the pages of this newsletter and elsewhere that eating fish like salmon high in omega-3 fatty acids is good for you. Youve seen countless ads touting the similar benefits of fish-oil pills containing those same omega-3s (EPA and DHA). Now suddenly comes a flurry of headlines suggesting a scary downside to these health-promoting omega-3s, at least for men: High Levels of Fish Oil May Boost Risk for Prostate Cancer, Omega-3 Supplement Taken By Millions Linked To Aggressive Prostate Cancer.

You already know beans are good for you: The Dietary Guidelines for Americans recommend that women consume 1 1/2 cups of beans and other legumes weekly, or 1 cup for ages 51-plus, and that men eat 2 cups a week, 1 1/2 cups after age 50. Moreover, beans and other legumes are the only type of food that the Guidelines promote in two different categories-as part of the Protein Foods Group (along with meats, poultry and fish) and as part of the Vegetable Group, because they are excellent sources of dietary fiber and nutrients such as folate and potassium.

As a reader of this newsletter, youre already aware that consumption of red meat has been linked to increased risk of heart disease and colorectal cancer. So youre exercising portion control and trying to eat more lean poultry and fish. But sometimes, well, beef is whats for dinner.

A pair of randomized, controlled trials-considered the gold standard for scientific research-have linked eating blueberries to improved blood-vessel function. Jeremy Spencer, PhD, of the University of Reading in England, and colleagues reported in the American Journal of Clinical Nutrition: Our data suggest that consumption of blueberries at dietary intakes may have public health relevance in maintaining circulatory function.

Answer : A The concern about flaxseed oil-and, to a much lesser extent, canola oil-stems from the alphalinolenic acid (ALA) content of these oils.

Answer : AJoel B. Mason, MD, Tufts professor of medicine and nutrition and director of the HNRCA Vitamins & Carcinogenesis Laboratory, replies: In general, the increased risk of cancer associated with alcoholic beverages is observed...