Potato chips are made from either thinly sliced potatoes that are deep-fat fried or dried potatoes that are processed into chips, according to the U.S. Food and Drug Administration. Potato chips can be cooked in a variety of fats. The most common types are sunflower, corn and cottonseed oils.

Saliva keeps microbe colonies in check. Without adequate amounts of saliva, microbes that cause gum disease can colonize the mouth, contributing to receding gum lines. Mouthwashes that contain harsh chemicals such as sodium lauryl sulfate or alcohol contribute to a decrease in the amount of saliva your produce.

"An apple a day keeps the doctor away." True enough. However, apple seeds contain a substance that can convert into poisonous hydrogen cyanide in the intestine. But there is no need to panic.

Peanuts, including peanut butter, are one of the major eight foods that account for around 90 percent of the food allergies in the United States. According to the Centers for Disease Control and Prevention, approximately 3.3 million Americans are allergic to peanuts.

It’s probably safe to assume that the average American enjoys popcorn -- the whole-grain snack is consumed at a per-capita rate of about 200 cups a year, according to the U.S. popcorn industry. At its best, popcorn is low in calories and fat, a good source of dietary fiber and virtually sodium-free.

Pumpkin seeds are not considered to be a highly allergenic food such as sesame or other seeds. In fact, according to the U.S. National Library of Medicine, allergies to pumpkin seeds are rare. Still, you may develop an allergy to pumpkin seeds if you are particularly sensitive to pumpkin.

Betel nut chewing originated in the tropical regions of southern Asia, but it has gradually spread to communities in Madagascar, eastern Africa and the West Indies. Quid, or chewable drug, made from betel nut typically contains a combination of betel palm nut, betel vine leaf, lime and tobacco.

Betel nut is a combination of three ingredients. People roll small pieces of the nut from Areca catechu, more commonly called betel palm, in a leaf from the Piper betel vine, then add powdered slaked lime or limestone paste, and chew it.

If the low-fat diet craze made you write off almonds as unhealthy, fatty fare, consider re-adding almonds to your diet. Consuming a diet rich in nuts, including almonds, benefits your cardiovascular health, and can halve your risk of suffering a heart attack, according to the Harvard School of Public Health.

The early predecessor to chewing gum, spruce gum, was popular in the early 1800s and was cut from the spruce tree, according to the Wrigley's website. Today, chewing gum is sweetened and made in a variety of flavors.