The 6 Best Foods for a Flat Stomach After 40

Carrots & Celery Carrots and celery are low-calorie, high-fiber snacks that keep you fuller longer.

Healthy Fats Avocado is full of healthy fats and goes well with a salad or slice on whole-grain bread.

Oatmeal Its high fiber content may help you lose weight by keeping you fuller longer during the day.

Lean Proteins A calorie shortage causes muscle loss and fat loss. Strength exercise and a high-protein diet reduce muscle loss.

Mushrooms Mushrooms are a rich, low-calorie source of fiber, which can promote fullness and aid in weight management.

Blueberries One of my favorite fruits to snack on is bite-sized blueberries. One cup of blueberries has 80 calories and 4 grams of fiber to keep you satisfied.