Sure, ketchup is tasty, but it’s also a serious saboteur when it comes your weight loss efforts. Ketchup is loaded with sugar — up to four grams per tablespoon — and bears little nutritional resemblance to the fruit from which it’s derived. Luckily, swapping out your ketchup for salsa can help you shave off that belly fat at home without a diet. Fresh tomatoes, like those used in salsa, are loaded with lycopene, which a study conducted at China Medical University in Taiwan links to reductions in both overall fat and waist circumference. If you like your salsa spicy, all the better; the capsaicin in hot peppers, like jalapeños and chipotles, can boost your metabolism, too.
You may also know this root veggie as a sunchoke since they’re the roots of a type of sunflower. According to a Canadian study, subjects whose diets were supplemented with a type of gut-healthy insoluble fiber called oligofructose not only lost weight but reported less hunger than those who received a placebo. Researchers discovered that the subjects who consumed the prebiotic fiber had higher levels of ghrelin—the hunger-suppressing hormone—and lower levels of blood sugar. And you guessed it: Jerusalem artichokes are one of the best sources of the fiber.
Carbs are not the enemy. Not whole-grain carbs, that is. People who ate three or more daily servings of whole grains (such as oats) had 10 percent less belly fat than people who ate the same amount of calories from processed white carbs (bread, rice, pasta), according to a Tufts University study. It’s theorized that this is due to whole grains’ high fiber and slow-burn properties, which keep you satiated longer.
Resolve to do more prying. Oysters are one of the best food sources of zinc, a mineral that works with the hormone leptin to regulate appetite. Research shows that overweight people tend to have higher levels of leptin and lower levels of zinc than slimmer folk. A study published in the journal Life Sciences found that taking zinc supplements could increase leptin production in obese men by 142 percent! A half-dozen oysters only have 43 calories but provides 21 percent of your RDA of iron—deficiencies of which have been linked to a significant increase in fat gene expression.
“For some people, it’s knowing, ‘Typically I eat a whole sandwich,’” says Gagliardi. “‘Now, I’m going to make the decision to eat half a sandwich at lunch and save the other half for my dinner and essentially cut my calories in half. And they feel good about that. They’re not having to do math.” To get started, check out these 25 simple ways to cut 500 calories a day.
But you'll lose the most fat by doing HIIT, or high-intensity interval training. This training technique involves working at full throttle for short intervals -- typically 10 seconds to a minute -- then recovering at a slow pace or resting for a minute or two. It increases your metabolism after a workout, since your muscles need to work hard to get "back to normal." HIIT also burns more belly fat than traditional, steady-pace cardio, according to Penn State University.