Common causes of foul-smelling gas can be a food intolerance, high-fiber foods, certain medications and antibiotics, and constipation. Gaseous odor accumulation: Smelly farts are usually the cause of gas produced by colonic bacteria during fermentation of unabsorbed food residues arriving into the colon. Causes of Smelly Gas: Sulfate in the foods we eat is the cause of most foul smelling flatus. Certain bacteria in the colon make sulfide gases in very tiny amounts and these gases have a distinct odor when passed by the body. People can also be intolerant to (and pass smelly gas from) other sugars, including sucrose (table sugar) and fructose (found in fresh fruit, corn syrup and some processed foods). Be aware that the foods high in fiber are usually major gas producers. Does your gas occur after eating? These high fiber foods are … Common gas-producing foods and substances include: Beans and lentils; Vegetables such as cabbage, broccoli, cauliflower, bok choy and brussels sprouts (cruciferous vegetables) Bran; Dairy products … The longer the food is kept in the digestive tract the more it causes smelly gas. Intestinal gas is a normal by-product of digestion, but excessive gas can cause loud, smelly flatulence, which can be both uncomfortable and downright embarrassing. These include beans, sodas and other carbonated drinks, sugar … Everybody tolerates foods differently. Controlling flatus smell starts with monitoring the amount of sulfate containing foods and … Foods: Perhaps the most common reason why most people experience smelly flatulence. Often, relatively simple changes in eating habits can lessen bothersome gas. When you think of foods that cause gas, beans are probably at the top of the list. This list should be used as a guide to help determine the best gas reducing diet for you specifically. There are many common foods that may produce gas. Changes in the microflora: Gas also depends on the composition of the colonic flora, in other words the type of bacteria living within the digestive system. This gas is produced during the digestive process when the body breaks down foods containing sulfur.The sulfur content of different foods can vary significantly, and this is why sometimes flatulence can be very smelly, and at other times, it may have almost no smell … Many conditions can cause diarrhea and gas.Some examples include lactose intolerance, irritable bowel syndrome, food poisoning, giardiasis, and rotavirus.Reactions to antibiotics may cause these symptoms in some people, but it is important to take all antibiotics as prescribed unless you are told otherwise by … An increase in gas or gas pain may result from eating foods that are more likely to produce gas. Beans contain a lot of raffinose, which is a complex sugar that the body has trouble digesting. Foods that cause gas in one person might not cause it in another. The problem is when passing gas becomes excessive or overly foul-smelling. This is usually due to the lack of fibrous materials in the diet, and is the most common cause of excessive smelly gas in pregnant women. Certain digestive system disorders, such as irritable bowel syndrome or celiac disease, may cause — in addition to other signs and symptoms — an increase in gas or gas … Certain foods tend to increase the levels of intestinal gas, but not all of them cause foul-smelling flatulence. The main cause of smelly flatulence is the presence of a gas called hydrogen sulfide. Having a tumor in the colon can lead to blockage, which can cause a gas build up and bloating. Foods that cause excess gas. How can you tell if gas is just an inconvenience or a sign that something more serious is happening? Some foods that are major gas producers for some people may cause normal gas for others.