Why do some foods spoil faster than others?

Foods spoil at different rates primarily because of their water content, nutrient composition, and pH levels. Foods high in moisture, like fresh meat, dairy, and cut fruits, provide an ideal environment for bacteria, mold, and yeast to grow rapidly. These microorganisms need water to thrive, so dry foods like crackers or rice last much longer. The nutrient content also matters because microorganisms prefer certain foods over others. Proteins and fats in meat and fish break down quickly through both microbial activity and chemical reactions like oxidation. Acidic foods like vinegar or citrus resist spoilage because most bacteria struggle in low-pH environments. Temperature, oxygen exposure, and the presence of natural antimicrobial compounds in some foods also play significant roles.