I noticed on an organic valley skim milk the other day it said “protein increased from 8g to 10 g” “calcium increased from 306 mg to 361 mg”. Does that mean they are adding calcium to the milk? Ingredients only say skim milk, vitamin a and vitamin d. I always thought supplementing calcium was toxic. I’ll probably avoid that one from now on. The organic valley skim grassmilk one doesn’t say that on it fyi.