Keeping track of what you eat is not always an easy task. Whether you have an app to help you moderate yourself, or you work with a container system, preparing food ahead of time, staying healthy can be a challenge.

While there is no zero-calorie food that will fill you up, fortunately there are some foods you don't need to worry about, because you can eat a ton of without adding to your waistline.

These foods are either made up mostly of water, are low in calories or contain fiber which will help you feel and stay full. While they may not be high in protein they contain plenty of vitamins and other nutrients that your body will benefit from.

Let your heart be your guide!

Honeydew Melon

Perfect for those who have a sweet tooth, you don't need to worry about your weight when eating this fruit. It also contains half of the Vitamin A and C we need every day as part of a healthy diet.

Tomatoes

Loaded with nutrients including Vitamin A, C, and B2, tomatoes are almost calorie-free and continue essential substances that our bodies need. Tomatoes are best known for their lycopene, a carotenoid which helps fight against chronic diseases and what gives the fruit its rich red color.

Celery

Since it's 95% water, celery is the perfect snack to munch on if you are watching your weight. It also has 30% of your recommended daily vitamin K intake. Celery also contains potassium, folate and fiber. You're best to eat it fresh though, as the vegetable loses many of its antioxidants within 5-7 days of being purchased.

Popcorn

You will be happy to hear that since it's mostly air, popcorn barely affects the body. So grab a handful and don't worry about a guilty conscience. Just make sure you aren't loading it with butter and salt.

Broccoli

If you want to make sure you're getting all the vitamins you need, look no further than broccoli. Containing large amounts of vitamins A, C, E and K, it's full of fiber which is good for filling a hungry stomach.

Cucumbers

Mostly made up of water, cucumbers only contain 16 calories per serving. The skin and seeds are the most nutritious part of the fruit, so try not to peel them.

Grapefruit

Studies have shown that grapefruit can help contribute to weight loss because they're high in fiber, which will keep your hunger at bay. With only 50 calories in half a grapefruit, it's loaded with Vitamin C and can help to lower cholesterol and improve digestion.

Oranges

Rich in vitamin C, oranges also contain a lot of fiber with surprisingly few calories, so it's no wonder why it's one of the most popular fruits in the United States. Since Vitamin C is essential in collagen production, oranges help to keep skin free of damage and looking good.

If you're not eating the white stuff under the orange's skin, called the pith, you should start. Pith contains a lot of fiber which is good for lowering cholesterol and blood sugar levels.

Strawberries

Diets aren't all about bland tasting food. The sweetness of strawberry is a must for anyone who is trying to keep track of their weight. Low in calories, they are also an anti-inflammatory. Surprisingly there is more vitamin C in one serving of strawberries than there is in one orange. They are also a great source of potassium and fiber and they're fat-free, sodium-free and cholesterol-free which makes them great for the heart.

Which of these is your favorite to snack on? Share with us in the comments.

Source: Newsner / Independent