black pepper for stomach upset, bronchitis, and cancer, white pepper for stomach upset, malaria, cholera. 
 

Black pepper (Piper nigrum)stimulates the taste buds in such a way that an alert is sent to to the stomach to increase hydrochloric acid secretion, thereby improving digestion. Hydrochloric acid is necessary for the digestion of proteins and other food components in the stomach. When the body's production of hydrochloric acid is insufficient, food may sit in the stomach for an extended period of time, leading to heartburn or indigestion, or it may pass into the intestines, where it can be used as a food source for unfriendly gut bacteria, whose activities produce gas, irritation, and/or diarrhea or constipation.

Black pepper has long been recognized as a carminitive, (a substance that helps prevent the formation of intestinal gas), a property likely due to its beneficial effect of stimulating hydrochloric acid production. In addition, black pepper hasdiaphoretic (promotes sweating), and diuretic (promotes urination) properties.

Black pepper has demonstrated impressive antioxidant and antibacterial effects--yet another way in which this wonderful seasoning promotes the health of the digestive tract. And not only does black pepper help you derive the most benefit from your food, the outer layer of the peppercorn stimulates the breakdown of fat cells, keeping you slim while giving you energy to burn.