Adjusted Calcium

Calcium corrected for the albumin carrying it. Low albumin makes an uncorrected calcium look low when the active calcium is entirely normal, so the adjusted figure is the one worth reading.

Adjusted Calcium in the Biomarker Guide — what it is, why it is tested, and what moves the number.

Add-on markers can only be added to venous samples.

Timing

Ideally fasted. Calcium rises after a meal. The albumin it is corrected against does not, so the fasting is for the calcium.

Ideal, not required. Glucose is the only marker we sell that is invalid unfasted. If fasting does not fit your day, take it anyway and do the same next time.

Turnaround: the lab reports this test within 24 hours of receiving your sample, counted in working days. Most samples reach them within about 3 days of posting. Full detail on our Turnaround Times page.

We do not interpret results. Not medical advice or a diagnosis.