The "Gastrointestinal Tract" (GI Tract) is a complex developed by Mikhail Vishnevsky for the correction and prevention of various disorders of the gastrointestinal tract, including gastritis, gastric and duodenal ulcers, dysbiosis, colitis, and other diseases. The mushrooms and plants included in this complex help improve the condition of the epithelial lining of the stomach and intestines, increase the secretion of digestive enzymes, and promote the growth of beneficial microflora in the intestines.