Although needing calcium and other minerals in particular I have a difficult time absorbing or tolerating most forms of calcium. Like calcium citrate it worked fine for a while then the body said 'No'. or the calcium might feel like I have rocks in my blood. Now there maybe other reasons, I have not figured out, for this difficulty but I can say I have no problems with Lifestream Natural Calcium. Really good and has other minerals too. All the better. Easily absorbed I can tell when my nails stop splitting almost immediately.
