You see them every day, advertisements about smiling families drinking "healthy milk" and "actor-doctors" advising women to drink lots of it in order to avoid osteoporosis. But how healthy and necessary milk actually is is questionable.
The very fact that we are the only animal that consumes milk beyond infancy should make us think. Furthermore, how is it possible that huge animals like elephants, which become as old as humans (70) and weigh much more (i.e. bones have a much "heavier" job), do not suffer from osteoporosis?
The answer lies in the green leaves they eat which are rich in calcium.
For us humans there are also plenty of green calcium-rich vegetables, (mostly green ones) like spinach, broccoli, soy beans , collards, bak choy, mustard greens, wasabi roots and many others.
Also, about 75% of world population seems to be lactose intolerant, meaning they can't really digest and eat diary products... Maybe another sign we don't really need it?
And what about those voices that say there are tons of carcinogen hormones, antibiotics and other dubious stuff in milk?.... You can of course ignore them, or read about them...
Conclusion: I would say, mind the milk. And if you want to continue drinking it in huge quantities, then at least go for skim milk (0% fat). This will keep you from growing fat PLUS you avoid all the hormones (estrogens) which reside in milks fat.