Powder Drinks Question - Dry ADEK

I realize DSers are suppose to have dry vitamins.  GNC has mega men and mega women power drinks.  Their technical support told me it was a dry form but it took so long to get an answer, I wanted to see if it was accurate.

Even though I am male, I take the mega women formula to get the iron.  When I do take the powder, my labs are in the normal range.   It does seem cheaper than taking a bunch of different individual vitamins.  Any thoughts or different opinions?