I didn't know until today that chamomile is packed with calcium and magnesium, two minerals that may improve sleep.  When one is deficient, leg cramps and restlessness may occur.  My pill (which also contains a bit of zinc) is a 2:1 ration.  That's two parts calcium for every one part magnesium.  The magnesium also help the calcium absorb more readily, making it an even better choice.

I may need to start drinking more chamomile (and less wine) near bed time.