Question: what happens if you drink a gallon of milk a day?
Answer: Calcium overload A gallon of milk a day delivers 4,800 mg, well surpassing the daily recommendation of 1,000 mg for most adults. Such a high daily intake of this mineral could be harmful. Experts caution that men and women between 19 and 50 years old should not consume more than 2,500 mg of calcium a day.