Farts often contain sulfur-containing compounds, such as hydrogen sulfide and methanethiol. These compounds are notorious for their strong, foul-smelling odors.

The human digestive system is home to trillions of bacteria. These bacteria help break down food in the intestines through a process called fermentation, producing gases as byproducts.

Foods rich in proteins, like beans, cabbage, and meat, can produce more foul-smelling gases when they are broken down in the digestive tract.

Specific types of bacteria in the gut are responsible for producing gases like hydrogen, methane, and sulfur compounds during the digestion process.

Certain bacteria in the gut are sulfur-reducing, meaning they convert sulfur-containing amino acids into hydrogen sulfide gas, which has a strong, rotten-egg-like odor.

Sometimes, food is not fully digested in the small intestine and reaches the large intestine in a partially broken-down state. This can result in the production of more gas and odorous byproducts.

The types of foods you eat can significantly impact the odor of your flatulence. Foods like garlic, onions, and cruciferous vegetables are known to contribute to stronger-smelling gas.

Certain gastrointestinal conditions, such as irritable bowel syndrome (IBS) or bacterial overgrowth, can lead to an increase in gas production and potentially stronger odors.