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Looking to achieve a flatter belly? While exercise is crucial for toning your midsection, adjusting your diet is equally important. “As we age, especially after 40, our bodies become more prone to blood sugar fluctuations and muscle loss,” explains Tara Collingwood, MS, RDN, CSSD, LD/N, ACSM-CPT, a Board Certified Sports Dietitian and co-author of Flat Belly Cookbook for Dummies. “Consuming foods high in protein, fiber, and healthy fats helps maintain stable insulin levels and strong muscles, both of which are vital for reducing belly fat,” she notes. “The key to a flatter stomach after 40 isn’t about severe dieting but staying consistent. Opt for foods that stabilize blood sugar levels and support muscle health, and you’ll notice improvements in your waistline naturally.” Discover the top seven foods that contribute to a flatter belly after 40, even without exercise.
Greek yogurt is an excellent choice for burning fat. “Rich in protein and probiotics, it aids digestion and reduces bloating,” says Collingwood. “By nourishing your gut with beneficial bacteria, Greek yogurt can help alleviate digestive issues,” she adds.
Greek Yogurt

Eggs are another effective food for combating fat. “They are loaded with protein and essential nutrients that boost metabolism and support lean muscle growth,” says Collingwood. “Eggs serve as a powerhouse meal, especially for breakfast, enabling your body to burn calories more efficiently throughout the day.”
Eggs

Eggs are another fat-blasting food. “Packed with protein and nutrients that support metabolism and lean muscle,” Collingwood says. “Eggs are a breakfast powerhouse that helps your body burn more efficiently all day.”
Leafy Greens

Leafy Greens will also fuel fat loss. “Low-calorie, high-fiber foods that reduce water retention and bloating,” she says. “Leafy greens are your body’s natural de-bloaters—light, hydrating, and full of nutrients.”
Salmon

Salmon is a nutrient-packed fish that is a great fat-loss food. “Rich in protein and omega-3s, which help reduce inflammation linked to stubborn belly fat,” says Collingwood. “Salmon delivers healthy fats that actually help your body let go of stored fat.”
Berries

Berries are a great way to sweeten food and burn fat. “Antioxidant- and fiber-rich for better blood sugar control and reduced inflammation,” Collingwood says. “Sweet, satisfying, and slimming: berries hit the trifecta for a flatter belly.”
Avocado

Avocado is a good source of healthy fats that help you burn fat. “Full of heart-healthy monounsaturated fats that help control hunger and belly fat accumulation. Avocado’s healthy fats keep you full and might help to fend off fat storage in the midsection,” Collingwood shares.
Green Tea

Sip on green tea to lose weight. “Contains catechins that may slightly boost metabolism and reduce bloating. Green tea won’t flatten your belly overnight, but it’s a great daily habit for hydration and gentle metabolism support,” Collingwood says.