Whether you’re at a backyard barbecues, a ballgame, on the beach or basking in the sun, a big part of summer fun is the food: Favorites you’ve had since school days that signal the season of sunshine is here, and you’re enjoying it. If you’re on a weight loss program, some of those perfect-for-summer foods can actually help you on your journey. So exactly which are the summer slim-down foods that help you lose weight?

These six options are more than just delicious summer favorites—thanks to the right combinations of nutrients, they’re also foods that help you lose weight :

1. Cool cucumber, local tomatoes and slices of watermelon

What do these foods have in common? Water. Thanks to their high water content, all three of these summer favorites don’t just cool you down, but they’re low in calorie density—which, according to Science Daily. means you can eat a lot of volume without eating a lot of calories. When scientists had obese women in a study add more water-rich foods to their diet plans, they lose 30 percent more weight during the first six months of dieting than those who didn’t focus on adding water-rich foods.

If you’re a watermelon lover, keep track of your portions: Because it’s high on the glycemic index, one cup of the luscious fruit counts as one SmartCarb on Nutrisystem program. Tomatoes and cucumbers, though, are unlimited foods, and count towards your four daily servings of non-starchy vegetables. Pile them on your plate next to your backyard burger or in a fresh, chilly summer salad to help you lose weight.

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2. Cool, creamy smoothies and frozen Greek yogurt treats

Greek yogurt has 17 grams of belly-filling, hunger-fighting protein in every 100 calories, according to the United States Department of Agriculture (USDA). And it’s also got calcium, which can help more of your weight loss come from fat.

Combine this thicker, creamier yogurt with berries for a cool parfait, or mix them in and freeze in popsicle molds for a fat-fighting fro-yo dessert. Smoothie lover? Double up on the weight loss power of Greek yogurt: Mix in leafy greens with your favorite fruit, Greek yogurt and ice for bonus nutrients and fiber to make your smoothie more filling. The sweetness of the fruit will help mask the flavor of the spinach or other leafy greens, getting you closer to your four daily servings of non-starchy vegetables.

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