4 Everyday Foods That Could Prevent Breast Cancer

New studies show that organic forms of selenium, a trace mineral in plants and grain-fed animal protein, may guard against breast cancer by normalizing the body's circadian rhythms (the internal clock that regulates how many estrogen receptors -- often linked to the disease -- your cells produce). Get your beneficial daily dose, 55 micrograms, with the selenium-rich foods here and double down on their other health perks.

Tuna

3 ounces light, canned in oil: 65 micrograms selenium

Get it in these recipes:
Balsamic Tuna Salad Sandwich
Tuna-Stuffed Peppers
Spicy Tuna Salad
Skillet Tuna Noodle Casserole



Lean Beef

4 ounces, cooked: 43 micrograms selenium

Get it in these recipes:
Beef and Avocado Tacos
Chipotle Beef Wrap
Hearty Beef Chili



Portobello Mushrooms

1 cup, grilled and sliced: 27 micrograms selenium

Get it in these recipes:
Cheese and Spinach Stuffed Portobellos
Beef & Portobello Mushroom Stroganoff
Roasted Portobello Caps




Low-Fat 2% Cottage Cheese

1/2 cup: 11 micrograms selenium

Get it in these recipes:
Cottage Cheese Veggie Dip
Vanilla Peach Cottage Toast
Honey-Whipped Cottage Cheese with Melon



More from FITNESS:
10 Ways to Lower Your Breast Cancer Risk
How to Give Yourself a Breast Self-Exam
Sweat for a Cure: 3 New Ways to Make a Difference


Get more breast cancer prevention tips, plus the true story of one woman's struggle with the "breast cancer gene," in the October issue of FITNESS -- on newsstands now!