Yes it can. The milk is high in calcium, and vitamin D, which is very important to keep you up and running! You don't have to drink it 24-7, but you should add a few extra glasses to your meals.
no, milk gains you weight depending on how you use it. Right after working out you should drink milk because it has calcium and helps build muscle and stronger bones faster. Drink water to lose...
Yes! I use welches 100% grape juice so it doesn't have any added sugar. And also do not forget to exercise like lots of walking and drink lots of the grape juice. Hope I helped! <3