Is Big Pharma Behind This Somehow?: So all of a sudden, Vitamin D is a thing for our family. The kids had blood tests with their recent check-ups, and one of them was for Vitamin D levels. It was no surprise that my son was deficient, because he hates milk and will not drink it. But my daughter is very happy to drink milk, and does so often, and so I'm surprised that she's deficient and apparently needs massive doses to catch up. A friend mentioned that she's D-deficient as well. Have I just not been paying attention, or is D-deficiency some sort of Public Health Issue du jour? I await the endless alarmist commercials.