Brunner's glands (or duodenal glands) are compound tubular submucosal glands found in that portion of the duodenum (the first part of the small intestine which is right below the stomach).

The main function of these glands is to produce a mucus-rich alkaline secretion i.e. Mucous (containing bicarbonate) in order to:

- protect the duodenum from the acidic content of chyme (which is introduced into the duodenum from the stomach) thus protecting it from an imbalance of acidity;

- provide an alkaline condition for the intestinal enzymes to be active, thus enabling digestion and absorption to take place;

- lubricate the intestinal walls.

They also secrete urogastrone, which inhibits parietal and chief cells of the stomach from secreting acid and their digestive enzymes. This is another form of protection for the duodenum.

The gut and gut health is widely recognised as an important factor in maintaining good health.

They are the distinguishing feature of the duodenum, and are named for the Swiss physician who first described them, Johann Conrad Brunner.

More Info: en.wikipedia.org