The two types of fiber in plant-based foods help digestion by dissolving easily or passing quickly through the digestive system. Soluble fiber forms a soft gel, while insoluble fiber moves through the stomach and colon, and keeps other food or waste moving too.

If you’ve been diagnosed with lactose intolerance, you can eat eggs as long as you don’t add any milk. Eggs do not contain lactose, the sugar found in milk, according to Drugs.com, but use caution when purchasing premixed egg products because they might contain milk proteins.

Humans are the only mammals that continue to drink milk after they finish breastfeeding as babies. However, around 60 percent of all people are estimated to develop lactose intolerance, which is the inability to digest dairy products, according to a Cornell University News Service.

Experiencing chest discomfort can be a frightening thing, but it doesn't always mean something is wrong with your heart. Several digestive issues can also cause chest discomfort, particularly problems with the esophagus -- the long, muscular tube that connects your mouth to your stomach.

If you've always been able to eat dairy and suddenly find that you can't do so anymore, you may be lactose intolerant. While sudden lactose intolerance isn't common or likely, it's certainly possible.

Pancreatitis is inflammation of the pancreas, an organ responsible for the production of several digestive enzymes and the hormone insulin.

Chocolate is a favorite of many children, often associated with holidays, birthdays and other celebrations. Chocolate products often contain numerous ingredients, some of which may be beneficial, but many of which can trigger a negative reaction or intolerance.

Lactose intolerance affects 30 to 50 million people in the United States, according to 2013 information reported by the Ohio State University Wexner Medical Center website. It is caused by the lack of a specific enzyme -- known as lactase -- that is normally found in the small intestine.

The gluten found in wheat, barely and rye can cause a variety of gastrointestinal problems for people who are diagnosed with gluten sensitivity, including nausea and vomiting.

When you eat too many animal-based protein foods, it takes your digestive system longer to break down their large molecules. As food lingers in the gastrointestinal tract, you may feel bloated and suffer from gaseous pressure.

Contractions of the uterus herald the first phase of labor. Contractions, also informally called "labor pains," are associated with gradual dilation of the cervix. Sometimes women may mistake other causes of abdominal pain for true contractions of the uterus. These other causes of pain are known as "false labor pains"

While most people have a bowel movement every day, having a bowel movement every 2 to 3 days is not a concern if that pattern is comfortable and normal for you. Constipation means that you have difficulty moving your bowels or have a bowel movement less often than is usual for you.