Jalapeno may not necessarily be a cure for acidity, but it does not aggravate the condition further either. Eating spicy food has been known to aggravate acidity but that applies for spice in the powder form. Fresh chilies and peppers are good to eat. They help treat stomach ulcers and even restrict the spread of life threatening cancers. Capsaicin, one of the main components of jalapeno, is known to have many uses. It is an ingredient being used in many different treatments. Capsaicin has shown to have the power to kill cancer causing cells without harming the good cells. Jalapeno peppers are also high in vitamin C and ascorbic acid. They are, however, considered a low acid food.