Per gram of protein, pork chops contain almost five times the selenium—an essential mineral that's linked to a lower risk of prostate cancer—of beef, and twice that of chicken. And Purdue researchers found that a 6-ounce serving daily helped people preserve their muscle while losing weight.
2. Iceberg Lettuce
Conventional wisdom suggests this salad staple is nutritionally bankrupt. But as it turns out, half a head of iceberg lettuce has significantly more alpha-carotene, a powerful disease-fighting antioxidant, than either romaine lettuce or spinach.
3. Mushrooms
This fungi's metabolites—by-products created when mushrooms are broken down during digestion—have been shown to boost immunity and prevent cancer growth, report researchers in the Netherlands.
4. Vinegar
Scientists in Sweden discovered that when people consumed 2 tablespoons of vinegar with a high-carb meal, their blood sugar was 23 percent lower than when they skipped the antioxidant-loaded liquid. They also felt fuller.
5. Red-Pepper Flakes
A Dutch study found that consuming a gram of red pepper flakes—about half a teaspoon—30 minutes prior to a meal reduced calorie intake by 16 percent. Plus, new research suggests its active ingredient, capsaicin, may help kill cancer cells.
6. Full-Fat Cheese
This dairy product is an excellent source of casein protein—one of best muscle-building nutrients you can eat. What's more, Danish researchers found that even when men ate 10 ounces of full-fat cheese daily for 3 weeks, their LDL ("bad") cholesterol didn't budge.
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