Stomach small rounded mass of chewed up food) enters the stomach through the oesophagus via the lower oesophageal sphincter. The stomach releases proteases (protein-digesting enzymes such as pepsin) and hydrochloric acid, which kills or inhibits bacteria and provides the acidic pH of 2 for the proteases to work. Food is churned by the stomach through muscular contractions of the wall called peristalsis – reducing the volume of the bolus, before looping around the fundus and the body of stomach as the boluses are converted into chyme (partially digested food). Chyme slowly passes through the pyloric sphincter and into the duodenum of
Tannic acid many parts of the world, such uses are permitted. In the United States, tannic acid is generally recognized as safe by the Food and Drug Administration. According to EU directive 89/107/EEC tannic acid cannot be considered as a food additive and consequently does not hold an E number. Under directive 89/107/EEC tannic acid can be referred to as a food ingredient. The E-number E181 is sometimes incorrectly used to refer to tannic acid; this in fact refers to the INS number assigned to tannic acid under the FAO-WHO Codex Alimentarius system. Tannins are a common impurity in the beverage ayahuasca