1. Have a LOW-PROTEIN diet
trial. Exclude as much proteins as you can from the diet
for at least 3-4 days, and see if gas will improve or at least the smell will go away.
2. Have a LOW-FAT diet trial. Exclude all fats: meat, all dairy products, egg yolk, olives, oil, and nuts for 3-4 days.
2. Have LOW-FIBER diet trial. No fruits, vegetables, bread and other cereals at all for 3-4 days.
Have one diet trial at the time. This may help in diagnosis.