6 Stealth Health Foods

Some foods just aren't taken seriously.

Consider celery, for example—forever the garnish, never the main meal. You might even downgrade it to bar fare, since the only stalks most guys eat are served alongside hot wings or immersed in Bloody Marys.

Tip: There is something about Mary: The brunch beverage is loaded with nearly five times as much heart-healthy antioxidants as a large tomato. Enjoy a guilt-free glass with these creative takes.

All of which is a shame, really. Besides being a perfect vehicle for peanut butter, this vegetable contains bone-beneficial silicon and cancer-fighting phenolic acids. And those aren't even what makes celery so good for you.

You see, celery is just one of six underappreciated and under-eaten foods that can instantly improve your diet. Make a place for them on your plate, and you'll gain a new respect for the health benefits they bestow—from lowering blood pressure to fighting belly fat. And the best part? You'll discover just how delicious health food can be.

Celery

This water-loaded vegetable has a rep for being all crunch and no nutrition. But ditch that mindset: Celery contains stealth nutrients that heal.

Why it's healthy: "My patients who eat four sticks of celery a day have seen modest reductions in their blood pressure—about 6 points systolic and 3 points diastolic," says Mark Houston, M.D., director of the Hypertension Institute at St. Thomas Hospital in Nashville. It's possible that phytochemicals in celery, called phthalides, are responsible for this health boon. These compounds relax muscle tissue in artery walls and increase bloodflow, according to nutritionist Jonny Bowden, Ph.D., author of The 150 Healthiest Foods on Earth. And beyond the benefits to your BP, celery also fills you up—with hardly any calories.

Tip: Celery is also the swizzle stick that can stir up your sex life. Learn why it's one of the 10 superfoods that may help you have more fun in the bedroom.

How to eat it: Try this low-carbohydrate, protein-packed recipe for a perfect snack any time of day.

In a bowl, mix a 4.5-ounce can of low-sodium tuna (rinsed and drained), 1 tablespoon of balsamic vinegar, ¼ cup of finely chopped onion, ¼ cup of finely chopped apple, 2 tablespoons of fat-free mayonnaise, and some fresh ground pepper. Then spoon the mixture into celery stalks. (Think tuna salad on a log.) Makes 2 servings

Per serving: 114 calories, 15 grams protein, 12 grams carbohydrates (3 grams fiber), 1 gram fat

Seaweed

While this algae is a popular health food in Japan, it rarely makes it into U. S. homes.

Why it's healthy: There are four classes of seaweeds—green, brown, red, and blue-green—and they're all packed with healthful nutrients. "Seaweeds are a great plant source of calcium," says nutritionist Alan Aragon, M.S. They're also loaded with potassium, which is essential for maintaining healthy blood-pressure levels. "Low potassium and high sodium intake can cause high blood pressure," Bowden says. "Most people know to limit sodium, but another way to combat the problem is to take in more potassium."

How to eat it: In sushi, of course. You can also buy sheets of dried seaweed at Asian groceries, specialty health stores, or online at edenfoods.com. Use a coffee grinder to grind the sheets into a powder. Then use the powder as a healthy salt substitute that's great for seasoning salads and soups.

Tip: Make perfect sushi at home, and reap the benefits of seaweed without staring down a super-sized restaurant bill.