For many years, health experts issued guidelines that warned the public to limit egg consumption because of the high amount of dietary cholesterol in the yolks.

Swelling of the body, often referred to as edema, is most common in the hands, arms, feet, ankles and legs, according to Mayo Clinic. While swelling may be a sign of certain underlying medical conditions, a doctor should be consulted if swelling continues over a long period of time.

Despite how it's marketed, apple cider vinegar is not a cure-all, but it does have elements that may be beneficial for digestion. The sweet and sour vinegar is a prebiotic and contains easy-to-digest carbs, both of which might be helpful in digestion.

Chemical imbalance in the brain is characterized by abnormal levels of neurotransmitters and hormones associated with affecting mood, sleep, anxiety and appetite. Certain nutrients from food cross the blood brain barrier and synthesize production of neurotransmitters and hormones.

The average American consumes 56 pounds of added sugar per year, wrote David DiSalvo, in the Forbes.com article "What Eating Too Much Sugar Does to Your Brain." That equals about 27.5 teaspoons of sugar a day -- or 440 calories.

A mainstay of Asian cuisine, ginger has long been celebrated for its healing effects. It has been used to treat colds, flus, headaches and menstrual symptoms, and has the potential to prevent cancer, according to a review published in "International Journal of Preventive Medicine" in April 2013.

Chemically similar to amphetamine, phenylethylamine is a mild alkaloid stimulant produced naturally in your body as a byproduct of the amino acid phenylalanine. A handful of foods made from cocoa beans contain phenylethylamine, or PEA.

Cultivated for more than 4,000 years, the dried fruit of the jujube tree, known scientifically as Ziziphus jujuba, is a pectoral fruit similar to dates and figs. In China, where jujube originated, practitioners of traditional medicine have long prized the jujube for its medicinal properties.

Papaya is a nutritious fruit, with each 1-cup serving providing significant amounts of fiber, folate and vitamins A and C. Eat too much of it, however, and you may increase your risk for gas or bloating due to papaya's fiber content.

Salmon is a peach/pink fatty fish with a flaky consistency. Salmon contains important protein and unsaturated fats, which have health benefits. Low in mercury, you can eat salmon several times a week and, according to the Health Unit website, you can eat salmon up to 14 times per week.

While some people may believe that the acidity and alkalinity of their food has a tremendous effect on health, the only part of the body that may be affected is your kidneys, according to a 2012 article published in the Journal of Environmental and Public Health.

The clear plastic wrap used to keep your foods safe could be hazardous to your health. Researchers have discovered that trace chemicals found in plastic products are responsible for an assortment of medical conditions.