There are as many as 7,500 apples grown worldwide, and about 3,000 varieties of pears found around the globe. Nutritional content can vary depending on variety, as well as whether you're eating canned, fresh, dried or frozen apples or pears.

Bosc pears are grown primarily in the Pacific Northwest states of Oregon and Washington. They have brownish skin and a somewhat crunchy but tender flesh that has a sweet-spicy flavor. You can enjoy them raw or use them in baking, broiling or poaching.

The benefits of eating blueberries and strawberries may far outweigh any health risks. Dr. Eric Rimm of Harvard Medical School advises people of all ages to eat more berries for heart health. Some people may have allergic reactions to berries or experience digestive problems, however, if they consume too many.

Kale and collard greens are excellent dietary sources of several essential nutrients. While not the most popular of vegetables, both provide a low-calorie source of potassium and vitamins C and K. They also offer a healthy source of dietary fiber.

Eating cantaloupe is intended to be a refreshing experience, but if you develop a burning sensation in your stomach, you may avoid eating the fruit. A burning sensation in the stomach may be a sign of a more serious digestive condition that needs to be assessed by your doctor.

The sweet potatoes that appear on the Thanksgiving dinner table as candied yams or soufflés adorned with marshmallows are a staple food of the U.S. South.

If you're following a calorie-controlled diet, leafy greens like lettuce and cabbage make smart additions to your diet. They have generous portion sizes -- a 2-cup serving counts as a single cup of veggies under U.S. Department of Agriculture guidelines -- so you'll feel satisfied after your meals.

A food allergy occurs when the body's immune system mistakes an ingredient in food as harmful, which triggers antibodies in the immune system to attack the food.

Coumadin is a medication that is prescribed to patients who have a history of blood clots in their legs, arms, heart or brain; a history of heart attacks or strokes; a replacement heart valve; abnormal heart rhythms; a large heart; or other cardiac complications.

Oranges offer a bonanza of nutrition -- a single medium-sized orange can provide you with 120 percent of your daily vitamin C requirement, along with valuable fiber and other vitamins and minerals. Unfortunately, though, oranges also provide plenty of acid, and that can irritate people with sensitive stomachs.

All potatoes are carbohydrate-rich, but not all potatoes are exactly the same. You can find a number of different varieties just by taking a trip to your local grocery store. Among the most common are Russet and Yukon Gold potatoes.

Although the debate about the link between food and acne rages on, there’s growing evidence that some foods, such as citrus fruits, can help to improve acne, or make it worse. Citrus fruits include lemons, oranges, grapefruit, clementines and kumquats.