The shelf life of Wangzai milk is six months, so you can't drink it often, because the additives and preservatives in it are not good for your health. Long-term drinking, single nutrition, is not conducive to physical development. Personally, I suggest that the nutrition should be balanced, and don't eat a single drink or food often, so that the body will be healthy and the nutritional balance will grow taller.
Wangzai can drink once or twice a week. At other times, he can find some other drinks instead, such as yogurt.
I hope my answer can help you. I hope it can be adopted. Thank you.