High-fructose corn syrup plus carbonation can certainly add up to flatulence. Fructose is found naturally in foods like honey and fruits, and it’s also the main ingredient in high-fructose corn syrup. Fructose is another one of those sugars that’s not easily digested by the body. It empties from the stomach more rapidly than other sugars, yet is more slowly absorbed. Therefore, it can linger in your gastrointestinal tract undigested, causing gas and bloating. High-fructose corn syrup is the second ingredient listed in cola, making up the almost 40g of sugar in just one 12-oz can. The first ingredient listed is carbonated water, another culprit that can cause flatulence. Carbonated liquid can cause a buildup of air in the stomach, leading to bloating, abdominal pain, cramping, belching, and, of course, flatulence. This is one beverage we certainly don’t recommend keeping in your diet. To eliminate it from your diet, try slowly swapping out one cola at a time for fruit-infused water or naturally flavored waters, until you no longer need it.