Indigestion: It is a common practice, particularly in Indian Subcontinent, to chew fennel seeds after meals. This is done to facilitate digestion and to keep bad breath away. Some of the components of the essential oils in fennel are stimulants and stimulate secretion of digestive and gastric juices, reduce inflammation of stomach and intestines and facilitates proper absorption of nutrients from the food. It also has anti acidic (basic) properties and is extensively used in antacid preparations. It is an appetizer too.
Flatulence: Fennel is most popular as an anti flatulent, due to the carminative properties of Aspartic acid found in fennel. Its extract can be used in right from the infants to the old, to cure flatulence and to expel gases from the stomach.Constipation: Fennel seeds, particularly in powdered form, act as laxative. The roughage helps clearance of bowels whereas the stimulating effect helps maintain the proper peristaltic motion of the intestines, thereby helping proper excretion.
Diarrhea: Fennel is helpful in curing diarrhea if caused by bacterial action, as some components of essential oils in fennel such as Anetol, Cineole etc. have disinfectant and anti bacterial properties. Some amino acids such as Histidine aid digestion and proper functioning of digestive system, thus helping cure diarrhea due to indigestion.
Colic: Polymeric and heavy molecules are useful in the treatment of Renal Colic. Such polymers, also called Phytoestrogens, are found in Anethole, a component of the essential oils in fennel. Fennel, with this virtue, is thus helpful in treating Renal Colic.Respiratory Disorders: Fennel is useful in respiratory disorders such congestion, bronchitis, cough etc. due to presence of Cineole and Anetol which are expectorant in nature, among their many other virtues.