Two ways that bacteria are helpful is that bacteria is used in the production of some foods such as cheese, pickles, butter, yogurt, sour cream, and chocolate. Without bacteri â¦ a, pizza would not be possible. Another way bacteria helps is by humans obtaining many health benefits from the action of bacteria. They help digest food, and they help the body produce certain vitamins. Bacteria is also used in the human body to produce insulin. Insulin is a protein that helps control the rate at which the body breaks down sugar.