Why do some burps taste like eggs?

Burps that taste like eggs or rotten eggs typically result from eating foods with sulfur-containing proteins. Sulfur-reducing microbes in the small intestine break down these proteins, creating a smelly hydrogen sulfide gas that is then expelled from the stomach as a burp, explains HealthHype.com.

Many food preservatives contain sulfur, including those on dried fruits, prepared salads and meat in fast food industries, explains HealthHype.com. Other foods containing sulfur include poultry, red meat, dairy, eggs, green vegetables, tomatoes, certain fruits, nuts, seeds and legumes. If avoiding such foods does not reduce the incidence of these burps, consult a doctor to rule out an underlying health condition.