Baby milk is a manufactured preparation formulated to resemble human breast milk for feeding infants who are not breastfed — more commonly called infant formula. It is typically based on cow’s milk or soy protein that has been extensively modified: whey-to-casein ratios adjusted, lactose or alternative carbohydrates added, vegetable oils blended to mimic milk fat, and vitamins, minerals, and long-chain fatty acids fortified to meet strict regulatory standards. Preparation hygiene is critical, since powdered formula is not sterile and has been linked to rare but serious Cronobacter infections; water must be hot enough to kill microbes but cooled to a safe feeding temperature. While formula sustains healthy growth, health authorities worldwide agree that breast milk remains the ideal infant food.