Girls who grow up eating PB&Js could be doing their breast health a favor.


Researchers from the Washington University School of Medicine in St. Louis, Dana-Farber Cancer Institute and Harvard Medical School found an association between regularly eating peanut butter[1] and having a lower risk of developing benign breast disease in early adulthood. Benign breast disease[2] is noncancerous, and occurs when there are changes to the breast or an injury or infection leads to lumps in the breast tissue. The research team did not investigate a link between peanut butter and malignant breast lumps or cancer.


Other sources of vegetable fats and proteins -- such as soybeans, beans and lentils -- could also have the same effect, but researchers noted that the data on these particular foods in the study was not as abundant as data on peanut butter.


It's important to note that the study only showed an association between peanut butter consumption and breast disease, and doesn't show that peanut butter can definitively prevent breast disease.


The study, published in the journal Breast Cancer Research and Treatment[3] , included health data on 9,039 U.S. girls ages 9 to 15 who were recruited to the Growing Up Today Study in 1996. They filled out food-frequency questionnaires once a year from their recruitment year until 2001, and then biennially until 2010.


In 2005, researchers also started keeping track of benign breast disease diagnoses among the study participants, who had entered adulthood and were now between ages 18 and 30. Researchers found that 112 of them had developed the condition.


Researchers found that eating peanut butter twice a week during childhood/adolescences was linked with a 39 percent lower risk of developing benign breast disease, and this effect seemed especially strong among girls who had a family history of breast cancer.



Of course, nuts have a wide range of other health benefits, too. To find out more, click here[4] .



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    A cup of iron-rich lentils packs <a href="http://nutritiondata.self.com/facts/legumes-and-legume-products/4338/2" target="_hplink">18 grams of protein</a> -- almost as much as three ounces of steak.
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  • Greek Yogurt


    Regular yogurt's thickier, tangier cousin can contain up to <a href="http://health.usnews.com/health-news/diet-fitness/diet/articles/2011/09/30/greek-yogurt-vs-regular-yogurt-which-is-more-healthful" target="_hplink">twice the amount of protein</a>, all for about the same number of calories and a lot less sugar, according to U.S. News Health.
    <br><br>
    Depending on the brand and container serving size, Greek yogurt can pack anywhere from <a href="http://www.stonyfield.com/products/oikos/single-serve/53oz-fruit-bottom/strawberry" target="_hplink">about 13</a> to <a href="http://www.chobani.com/products/c/nonfat/" target="_hplink">18 grams of protein</a>.
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  • Beans


    One cup of <a href="http://nutritiondata.self.com/facts/legumes-and-legume-products/4326/2" target="_hplink">garbanzo beans</a>, or chickpeas, contains 15 grams of protein, as does a cup of <a href="http://nutritiondata.self.com/facts/legumes-and-legume-products/4284/2" target="_hplink">black</a> or <a href="http://nutritiondata.self.com/facts/legumes-and-legume-products/4297/2" target="_hplink">kidney beans</a>.
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  • Tofu


    A half-cup serving of tofu contains <a href="http://ndb.nal.usda.gov/ndb/foods/show/4817" target="_hplink">more than 10 grams of protein</a>, according to the USDA.
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  • Tempeh


    A firmer, chewier cousin of tofu, a half-cup serving of this soybean-based bite has <a href="http://nutritiondata.self.com/facts/legumes-and-legume-products/4381/2" target="_hplink">15 grams of protein</a>.
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  • Spinach


    Cook a cup of the leafy green for more than <a href="http://ndb.nal.usda.gov/ndb/foods/show/3234" target="_hplink">5 grams of protein</a>. Spinach is also a good source of calcium and iron.
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  • Quinoa


    A cooked cup of this whole grain contains more than <a href="http://ndb.nal.usda.gov/ndb/foods/show/6430" target="_hplink">8 grams of protein</a>, and a hearty dose of filling fiber. Other grains, like brown rice and bulgur, are good meat-free protein options too.
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  • Peanuts


    Almonds, walnuts, pecans, pistachios and other nuts are <a href="http://www.rodale.com/vegetarian-protein-sources?page=2" target="_hplink">all good meat-free protein sources</a>, according to Rodale, but peanuts top the list. One ounce of dry-roasted peanuts contains nearly <a href="http://ndb.nal.usda.gov/ndb/foods/show/4782" target="_hplink">7 grams of protein</a>. Plus, nuts are loaded with healthy fats -- just don't eat too many!
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