Without contraindications, whole milk is better.

Whole milk is milk that contains fat and retains the flavor of milk; skim milk is milk that has been processed through a process that reduces fat and does not make you fat. But skim milk flavor is slightly lacking, there is a salty taste, many people do not adapt. So on balance, whole milk is better.

Purchase of milk notes

Fresh milk and pure milk are only raw cow's milk "real milk", we recommend that you choose these two types. When choosing, check the ingredient list. If it is fresh milk and pure milk, the ingredient list will only say raw cow's milk. There is no other ingredient after this word, only authentic pure milk. If it's prepared milk, the ingredient list starts with raw cow's milk and is followed by various food additives.

Fresh milk requires low-temperature refrigeration and has a short shelf life, so be sure to check the production date and shelf life when choosing to buy, and try to avoid buying products that are on their expiration date.

The above reference? Baidu Encyclopedia - Milk