Bacteria are small organisms that multiply quickly, and they can be either a good or bad thing when it comes to health and food. When you eat yogurt, for example, the healthy bacteria contained therein can benefit your digestive tract.

The gallbladder, which is a located under the liver, concentrates and stores bile produced by the liver. There are three main causes of gallbladder problems: gallstones, cholecystitis and cancer.

Lysine is an essential amino acid that acts as a building block of protein in the body. Lysine is important because it helps the body absorb calcium and builds collagen to promote healthy tissues such as the skin. Foods that provide the essential amino acid include red meat, pork, poultry, eggs, nuts and seeds.

The causes of heartburn and nausea can vary from temporary viruses to serious disease. The causes of nausea are different than the causes of heartburn. If you have one of these symptoms, it's important for you to determine the causes so you can prevent serious problems.

According to the National Institutes of Health, Prilosec is a proton pump inhibitor. Also known as or omeprazole, Prilosec is mainly used in infants to treat gastroesophageal reflux disease, a condition in which backward flow of acid from the stomach causes heartburn and injury of the esophagus.

The human digestive tract, while living, measures approximately 20 feet long. Your mouth is the entrance, and your anus is the main exit. When you swallow foods or beverages, you also swallow air, which contains oxygen and nitrogen.

Chronic sinus drainage manifests itself in two ways: a runny nose or postnasal drip. Postnasal drip is a condition where thin nasal secretions drip in the back of the throat, leading to a sore throat, coughing and an upset stomach, according to the American Academy of Otolaryngology.

Iodine is a trace mineral that's usually found in the form of iodide. It's needed for your thyroid gland to make thyroid hormones called thyroxine and triiodothyronine. Iodine is also needed for your immune system and might help treat fibrocystic breast disease.

Acid reflux describes a condition where partly digested food in the stomach mixed with digestive juices, namely hydrochloric acid, backs up into the esophagus through the esophageal sphincter.

Diarrhea, characterized by frequent runny bowel movements, is often accompanied by a loss of appetite in conditions such as the stomach flu and celiac disease.

Digestion is the body’s process for breaking down foods that you eat. Some elements of these foods are used to produce energy and the remaining waste is prepared for excretion. Slow digestion can make you feel sluggish and may cause constipation. However, you can take a number of steps to naturally speed up digestion.

Both colic and reflux can test a new parent's stamina and patience, but the conditions have very different symptoms. Colic is characterized by general irritability late in the afternoon. A colicky baby is content in the morning, but seems to wind up as the day progresses.