Anonymous wrote:How much calcium does he get in a day? Figure it out and see if it meets his needs - this is based on numbers not a “feeling”
Actually, this is pretty hard to calculate. A cup of spinach has about the same amount of calcium as a cup of milk, but only 1/10th as much is actually absorbed on average (because of the presence of oxalic acid).
My DH is a ped and he agrees with the 1 glass of fortified OJ advice. One of the main roles of vitamin D is to aid calcium absorption. There is a fair amount of evidence that consuming them together does actually make a difference in absorption rates (hence why milk has historically been vitamin D fortified), though it is hard to study. Also, the acid in OJ may prevent the acid rebound effect you often see with calcium carbonate. Basically, OJ is an excellent vehicle for calcium supplementation and most kids like it or at least tolerate it well.