A study published in the International Journal of Obesity looked at large population studies with nearly two million participants and found that people who regularly drank high amounts of milk had lower levels of both good and bad cholesterol, although their BMI levels were higher than non-milk drinkers. Further analysis of other large studies also suggests that those who regularly consumed milk had a 14% lower risk of coronary heart disease.
The team of researchers took a genetic approach to milk consumption by looking at a variation in the lactase gene associated with digestion of milk sugars known as lactose. The study identified that having the genetic variation where people can digest lactose was a good way for identifying people who consumed higher levels of milk
