Compared with whole milk, the main difference between skim milk and low-fat milk is that the fat in milk is separated and eliminated, while the main nutrients remain unchanged. The fat separated from these dairy products belongs to "unhealthy" animal fat, and excessive intake will increase the burden on the cardiovascular system. So if you can find skim/low-fat milk, they are the first choice for drinking milk.
Drinking skim low-fat milk is not only good for losing weight, but also good for health.