Calcium
Calcium isn’t just for bones — it also regulates nerve signals, muscle contraction, heart rhythm, and hormone release. Blood calcium is tightly controlled, so small shifts can flag deeper issues with vitamin D, parathyroid function, magnesium, or kidney health. Most of your calcium is stored in bone — blood calcium reflects your body's moment-to-moment regulation.
- Unit
- mg/dL
In your dashboard
Your trend, against your optimal range.
Example data · how your trend would appear once you test
At every level
What we'd do at any value.
Exploring
9.70mg/dL
LowOptimal 9.20–10.20High
In your optimal zone
Habits that hold this position.
No specific guidance for this zone yet. We're working on it and will update this soon.
Order a test
Pick the lab that fits your day.
QuestTest code: 303$4
BioreferenceTest code: 0050-5$6
LabCorpTest code: 001016$8