You may have heard that eating after 6 p.m. -- or 7 p.m. or 8 p.m. -- causes you to gain weight. The premise behind this myth is that because you go to bed before you have time to burn the calories, late-evening meals turn into fat.

Lipases are a general class of enzymes that break down fat molecules. Fats, also called lipids, exist in many forms; different kinds of fats require different lipases to break them down. Your body uses lipases to digest fat and also depends on lipases to help move cholesterol in the body.

Digestive gas, or flatulence, results from bacterial fermentation of undigested food in your intestine, mostly in the colon.

If your baby is vomiting, has diarrhea or seems to have a stomachache, you may not know exactly what’s causing the problem. Get in touch with his doctor to make sure that the root of the upset stomach doesn’t require medical intervention.

Motrin is a brand name for the generic drug ibuprofen, a nonsteroidal anti-inflammatory drug, or NSAID. Motrin primarily is used for relieving pain and reducing inflammation, especially in treating arthritis.

Mid-abdominal pain may arise for a variety of reasons. Many organs and bodily systems are contained within or near the abdomen, so pinpointing the exact cause of pain can be challenging.

Sorbitol is a sugar-based alcohol naturally found in small amounts in some fruits and berries, but it’s known more for its artificial synthesis and use as a sugar substitute. Sorbitol is commonly found in sugar-free products such as chewing gum, candies, ice cream and cough syrups.

Ulcerative colitis, an inflammatory bowel disease, causes inflammation, irritation and sores in the lining of the rectum and colon. During periods of symptom flare-ups, which often involve rectal bleeding, abdominal pain, fatigue and loss of fluids or nutrients, eating a normal diet becomes difficult.

Butter cream frosting is intended to be an enjoyable food, but for some people eating butter cream icing can cause an upset stomach. An upset stomach is the general term used for stomach bloating, nausea, vomiting, diarrhea and abdominal cramping.

Belching, or burping, is your body's way of getting rid of excess air from your stomach. Belching is natural, but can cause discomfort and embarrassment. Diarrhea, characterized by loose stools passed frequently throughout the day, is a common problem.

The U.S. Food and Drug Administration has not yet approved "whole-leaf" or "crude" stevia as a sweetener in foods, according to information on the administration's website. However, certain "refined stevia preparations" such as rebaudioside A can be marketed as stevia by food manufacturers.

Nausea is usually the precursor of an act the body performs called vomiting, where contents in the stomach get eliminated forcefully through the mouth. This occurs in the body as a symptom as opposed to an actual disease, and the triggers that can cause it stem from the intestines, brain and inner ear.