I'm happy to hear that Sarah continues to improve. Optimum D level is considered 50-80, so her level is good, and she is improving with her current regimen, so it would be wise to continue the D. So many people take calcium without D, making it mostly useless. Because the heartbeat is controlled by calcium and magnesium working together, I suggest using magnesium anytime calcium is used, as an imbalance can cause hear palps, when supplementing with calcium alone.