Because you harvest zucchini when immature, this summer squash contains fewer nutrients than mature winter squashes that develop large stores of starch and sugar. As with cucumbers, most of the weight of a fresh zucchini comes from water. Zucchini provides good flavor and only a few calories, whether raw or cooked.

Foods that are considered low in citrus are actually low in citric acid. Citrus refers to a type of fruit in the Rutaceae family, while citric acid is an organic compound found within the fruit.

Spinach is a versatile green that is high in essential nutrients. One 1/2-cup serving of frozen spinach has 20 calories, 2 grams of dietary fiber, 3 grams of protein and several vitamins and minerals.

Cucumbers were first introduced to North America by Christopher Columbus, and today they make up a staple in many Americans' diets.

The health benefits of the banana are numerous. They are high in potassium, which helps us maintain normal blood pressure, and fiber, which helps prevent heart disease. Unripe bananas are green. They are safe to eat, and have most of the health benefits of the riper yellow banana.

The best pineapple varieties ripen fruit with a perfect balance of acid and sugar. If a pineapple contains too much acid, the fruit quality falls. The acid-to-sugar ratio of the fruit helps determine whether a specific cultivar produces fruit for canning or for fresh use.

The Cara Cara is sometimes called the red orange fruit because, while it resembles a navel orange from the outside, the inner flesh is pinkish-red. The flavor is like that of an orange but slightly tangier. It imparts a range of nutritional value, including vitamin C, folate, vitamin A and potassium.

Most apples are similar in nutrient content. A large Gala apple offers many health benefits. Apples are in season in the summer and fall, but are sold year-round in most supermarkets. Gala apples typically arrive in stores in August and are red-orange with yellow stripes.

Like most berries, blackberries and blueberries are low in calories and fat. They are good sources of fiber and offer several essential vitamins and minerals. Either berry is a healthy and nutritious addition to your diet, but there are a few specific nutritional differences between blackberries and blueberries.

The best recourse for not cutting into an unripe mango is to know how to avoid buying an under-ripe mango in the first place. But if you still happen to cut into one that is not sufficiently ripe, it's still salvageable.

As strawberries pass their peak to the point of becoming overripe, they begin to lose their vibrant flavor, color and juiciness. You don’t have to toss them just yet, as there are several recipes where overripe strawberries will work just as well as fresh berries.

Carrots don't make the list of the top six allergy-inducing foods, but some people are allergic to them. People with allergies to carrots typically are also allergic to birch tree pollen, because the proteins in raw carrots are similar to those in birch tree pollen.