- Milk is a nutrient-rich food. In addition to macronutrients like proteins and carbohydrates (lactose), it is an excellent source of certain minerals and vitamins. - Calcium is a key mineral in milk, essential for bone health. - Potassium is also found in milk and plays a role in maintaining electrolyte balance and blood pressure. - While milk contains trace amounts of iron, it is generally not considered a significant source of iron.