Special Reports

While theres something to be said for clean eating, the "detox" fad needs a reality check. "First, your body already has a highly effective system for removing toxins, principally the liver and kidneys," explains Irwin H. Rosenberg, MD, University Professor of Medicine and Nutrition at Tufts. "Second, diets and products that claim to detox the body do not identify what supposed toxins are being targeted."

If you're planning to join the holiday travel crush - or already looking ahead to 2016 vacations - there's good news about your eating options en route. "I actually think that airport choices are beginning to improve a bit, both in terms of take-out and sit-down options," says Jeanne Goldberg, PhD, professor at Tufts' Friedman School and director of the Nutrition Communication Program. "The onus is to choose among the better options."

Two of the nations leading nutrition experts have some advice for the federal government: Stop worrying about total fat. Nutrition research has shown that the emphasis on restricting total fat intake is outdated, yet these limits affect everything from Nutrition Facts labels to school lunches to supermarket products. In recent opinion pieces in JAMA and the New York Times, Dariush Mozaffarian, MD, DrPH, and David S. Ludwig, MD, PhD, argue, Its long past time for us to exonerate dietary fat.

Most of the soaring popularity of protein in US supermarkets can be dismissed as marketing hype. Although a new report from Packaged Facts says protein is currently the hottest functional food ingredient trend in the US, the truth is that most Americans get plenty of protein without any special dietary boosts.

What exactly is protein? Some experts say its best to think of protein as a combination of up to 20 individual nutrients called amino acids, which are the building blocks of proteins and play various key roles in human metabolism.

Getting plenty of protein doesnt have to mean chowing down on a big, thick porterhouse. Leaner cuts of red meat are good protein sources, as are poultry, fish and plants (especially legumes).

You hear the term processed food thrown around a lot these days, but you have to use common sense, says Alice H. Lichtenstein, DSc, director of Tufts HNRCA Cardiovascular Nutrition Laboratory and executive editor of the Health & Nutrition Letter. Even though technically processed, pasteurized milk is safer than unpasteurized. Frozen produce, because its picked and frozen at the peak of freshness and processed quickly, is as nutritious as fresh or in many cases more so. And if the convenience of ripping open a bag of baby-cut carrots makes you more likely to snack on them instead of chips or cookies while preparing dinner, thats good fallout from processing.

Since the early 1940s, when multivitamin/mineral supplements first became available, Americans have popped countless such pills in hopes of nutritional insurance and making up for any dietary shortfalls. Today, more than one-third of all Americans take a multivitamin, and multivitamins alone account for more than 40% of all vitamin and mineral supplement sales-an estimated $5.4 billion annually. Yet the scientific evidence for the benefits of multivitamins is mixed at best, with large recent studies reporting no association between usage and better cardiovascular or cognitive health and only modest cancer protection.

For the first time, Americans are spending more money eating out at restaurants than buying food in grocery stores. According to the US Census Bureau, consumer spending at restaurants narrowly edged grocery-store purchases in December 2014, $50.4 billion to $50.2 billion. That tiny gap has widened, with restaurant spending exceeding groceries by nearly 3% as of April. Factors driving the switch included an increasing trend to buying groceries in warehouse and club stores, with cheaper prices, and lower gas prices freeing up funds for eating out. The total doesnt include ready-to-eat dishes purchased at upscale supermarkets, which further diminish what were cooking from scratch.

Popular coverage of diet and weight-loss strategies often summarizes the bottom line with a twist on President Bill Clintons campaign mantra, Its the economy, stupid. When it comes to managing your weight, as this line of thinking goes, Its the calories, stupid.But a new study published in the American Journal of Clinical Nutrition challenges this conventional wisdom. It builds on earlier work that suggests all calories are not the same, says Dariush Mozaffarian, MD, DrPH, dean of Tufts Friedman School and senior author of the study. All foods have complex mechanisms that help or hinder weight long-term. The simple math of calories in versus calories burned is true if youre testing food in a test tube. But human beings are not just inert buckets to put calories in.