Top 5 Causes of Borborygmi. 1  High Fibre Grains: Foods such as grain, oat, wheat and rye majorly contribute to borborygmi. 2  Fructose / Sugar: Fructose plays a big part in borborygmi, as does sugar.  Beans: Beans and Legumes have shown to cause borborygmil Beans in particular are big gas causing foods.