Your hydrochloric acid is likely to be damaged if you overeat any type of protein, such as animal meat, nuts, seeds, and/or legumes. (If the protein comes from greens, sprouts, or other vegetables, it doesn’t have the same effect.) Eating a lot of foods that combine fat and sugar (such as cheese, whole milk, cakes, cookies, and ice cream), can have the same harmful effect on hydrochloric acid.