20 Fittest Foods

4) Tomatoes
83 calories per cup
Eat 4 servings per week
Yes, it's true that tomatoes used to be called "love apples" and have a reputation as a powerful aphrodisiac. But that lore has nothing to do with why we picked the tomato as the best food for sexual health. Rather, tomatoes win their place on our chart-and their relatively high ranking overall-because of a single nutrient: lycopene.

This powerful antioxidant, which comes from the pigment that gives tomatoes their red color, may actually help fight off a number of diseases and ailments-most important for men, prostate cancer. Numerous studies show that men who have the most tomatoes and tomato-based products in their diet are less likely to develop prostate problems than men who rarely eat the stuff. And the good news for guys on the run: Tomatoes are also that rare food that's more nutritious when cooked than when eaten raw. "Lycopene becomes more bio-available to the body after it's been heated," says nutritionist David Ricketts, a prostate-cancer sufferer who used his disease as the motivation for writing the cookbook Eat to Beat Prostate Cancer. "You can start off the day with a glass of tomato juice and have a tomato-based sauce a couple of times a week. However you can work it in, you're pretty much on the way."

3) Oatmeal
148 calories per half cup
Eat 3-4 servings per week
When it comes to eating breakfast in the morning, there's nothing better than a bowl of oatmeal to spike your energy levels and provide you with an hours-long supply of fuel. Oatmeal is also filled with stress-fighting and immunity-boosting zinc.

If that weren't enough to convince you to pop a bowl in the microwave, keep in mind that oatmeal can also help promote weight loss and lower your risk of heart disease. Oatmeal is filled with high levels of soluble fiber that protect your heart and arteries by trapping and expelling cholesterol, dropping levels by up to 30 points or more in some cases, says Kubiak.

The best oatmeal may not be the most convenient, however. Those flavored, single-serving packs that litter grocery-store aisles are often filled with added sugar-and therefore excess calories. Instead, stick with the big tub of instant oatmeal and add your own fruit and calorie-free sweeteners, if you need them.