Vasopressin has three main effects: 1  Increasing the water permeability of distal convoluted tubule and collecting duct cells in the kidney, thus allowing water reabsorption and excretion of more concentrated urine, i.e., antidiuresis.
It can be caused by damage to the vagus nerve, which regulates the digestive system. A damaged vagus nerve prevents the muscles in the stomach and intestine from functioning, preventing food from moving through the digestive system properly. Often, the cause of gastroparesis is unknown.
How your stomach responds to fiber may be the key to how serious your condition is. High-fiber diets can cause bloating and a hard stomach because fiber creates bulk and expands the stomach. On the other hand, a low-fiber diet can prevent thorough digestion, causing buildup in the digestive system.