Milk delivers a solid mix of protein, calcium, and calories. Many brands fortify it with vitamin D, which helps the body absorb calcium. Drinking it after a workout supports muscle repair and rehydration. People also use it as an easy protein source with meals.
Plain milk contains no vitamin D on its own. Only fortified products add that nutrient. Anyone with lactose intolerance may face bloating, gas, or cramping. Lactose-free versions and plant-based drinks sidestep those issues for most people.
Milk can block proper absorption of certain antibiotics, including tetracyclines and fluoroquinolones. It may also reduce uptake of some thyroid drugs. A history of calcium kidney stones calls for careful intake and a talk with a doctor.