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    By Kelly Dinardo

    Redbook Magazine Logo

    These foods are healthy one day, unhealthy the next. Here's the bottom line.


    • Old news: Eating fish a few times a week can help lower heart disease risk — by more than 30 percent, according to one large study.
    • Latest news: It was widely reported that it's not the fish itself but rather the overall healthier eating habits of fish eaters that boost heart health, based on a new study published in the American Journal of Cardiology.

    The real deal: This one new study doesn't disprove the countless other studies showing that it is the omega-3 fatty acids in fish that can greatly reduce your risk of heart disease, says Nieca Goldberg, M.D., author of The Women's Healthy Heart Program. Omega-3s may also boost your mood and improve infantbrain development. Goldberg recommends eating two to three servings of fish a week (but no more than two weekly servings if you're pregnant) to reap the benefits.


    • Old news: Consuming dairy products can help you slim down. The difference dairy makes is small, but significant — you lose about 5 percent more body fat on a high-dairy diet, according to a University of Tennessee study.
    • Latest news: Dairy has no effect on weight loss at all, according to more recent research. These findings led the Physicians Committee for Responsible Medicine (PCRM) — a nonprofit group that promotes ethical and effective research — to convince the Federal Trade Commission to halt two dairy ad campaigns touting milk's weight-loss benefits.

    The real deal: This debate is mired in politics and spin: The University of Tennessee study was funded by the dairy industry, and the PCRM has fairly extreme views on nutrition and advocates a vegan diet (which excludes milk, of course). But scientists do know that calcium raises levels of calcitrol, a hormone that causes your body to store less fat, and the effect appears greater when calcium comes from food rather than supplements. "You still have to watch calories," says Jill Fullerton-Smith, author of The Truth About Food. "But I need calcium, and if dairy might also help get rid of a little extra fat, I'll keep eating low-fat yogurt while we sort through the science."

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