when i was pregnant, i drank pura skim. one giant latte cup (at least 450ml) morning & night. i used to add horlick to it cos you're not suppose to drink cold drinks when u'r pregnant & i hated warm milk. so i added horlick (horlick only, no additional sugar, but horlick is quite sweet on its own) to disguise the taste. but when it was time to check my blood glucose, i was borderline failing. so my obgyn gave me one more chance - checked me again after a month. so i stopped the horlick totally, and just drank plain skimmed milk warmed (holding my nose). when i checked blood glucose again 1 mth later, i was better than normal!!
so watch out for those things u add to your milk.
if it's for the calcium, u can choose to go to IMI (17/F kailey bldg, stanley st) to get the cal-mag from whole food . very gd. i'm still taking them now that my baby is 14 mths-old. cos im still bf her.
gd luck!