+Blood calcium, or serum calcium, is the amount of [Calcium](/wiki/calcium) circulating in the bloodstream. This vital mineral is tightly regulated by hormones like [Parathyroid Hormone](/wiki/parathyroid_hormone) to ensure proper bone health, nerve function, and muscle contraction.
+## See also
+- [Bone Health](/wiki/bone_health)
+- [Hormone](/wiki/hormone)
+- [Vitamin D](/wiki/vitamin_d)
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