Black pepper essential oil offers countless remedial properties, including laxative, carminative, antibacterial, expectorant, antioxidant, anti-inflammatory, diuretic, antiseptic, stimulant, antispasmodic, rubefacient, diaphoretic, febrifuge, and many more. Good for the stomach: It increases the secretion of hydrochloric acid in the stomach, which in turn improves digestion. Healthy digestion is essential to prevent colic, constipation, and diarrhea. Black pepper also prevents the formation of intestinal gas and it promotes urination and sweating, which helps remove toxic matter from the body.