Calcidiol+ercalcidiol

ChemistryAlso known as: 25(OH)D3 BldC-mCncAlso known as: 25(OH)D3 BldCo-sCncAlso known as: 25(OH)D3 Msmt SerPlng/dL

Measures combined levels of vitamin D2 and D3 to assess total vitamin D status.

Normal Range
50 – 100
ng/dL
Abnormal Levels
< 30 ng/dL
> 100 ng/dL
Specimen Type
Blood

Why This Biomarker Matters

25-hydroxyvitamin D is the most reliable indicator of vitamin D sufficiency. Low levels require supplementation to support bone health and immune function.

Optimal Ranges

Clinician-defined 4-point reference thresholds (ng/dL)

Default Range

30
50
80
100
Low
30 ng/dL
Borderline Low
50 ng/dL
Optimal
80 ng/dL
Borderline High
100 ng/dL

Overview

This test measures total 25-hydroxyvitamin D, combining both vitamin D2 (from foods and supplements) and vitamin D3 (from sun exposure and food). The 25-hydroxy form is the best indicator of overall vitamin D status because it reflects total body stores. This single measurement efficiently assesses vitamin D adequacy for bone health, immune function, and calcium regulation without measuring multiple vitamin D forms.

Related Health Conditions

Conditions where Calcidiol+ercalcidiol is commonly tested

Dental caries

Depressive disorder

Mild cognitive disorder

Multiple sclerosis

Periodontitis

Poor short-term memory

Vitamin D deficiency

Related Health Goals

Enhance Cognitive Function

Manage Autoimmune Risk

Promote Healthy Aging

Strengthen Bone Health

Support Mental Wellness

Support Oral Health

Treatments & Interventions

Therapies monitored using Calcidiol+ercalcidiol

Imipramine hydrochloride

Imipramine pamoate

Phenelzine sulfate

Desipramine hydrochloride

Nortriptyline hydrochloride

Dibenzepin

Adrenocorticotropic hormone

Silver

Methylphenidate hydrochloride

Protriptyline hydrochloride

Amitriptyline hydrochloride

Trazodone hydrochloride

Phenylalanine

Azathioprine sodium

Fluoxetine hydrochloride

Clinical Trials

179
Total Trials
17
Recruiting
35
With Results

Recent Trials

Oral Bacteria and Immune System Problems Involved in Gum Disease (Periodontitis)

NCT01568697Recruiting700 enrolled

Oral Vitamin D Supplementation Prevent Peritoneal Dialysis-related Peritonitis

NCT05860270Phase 4Recruiting176 enrolled

RNA Editing as a Biomarker of Antidepressant Response in Unipolar and Bipolar Depression (EDIT-ANDRE)

NCT07266545Phase 4Recruiting120 enrolled

Examining the Effects of Estradiol on Neural and Molecular Response to Reward

NCT05282277Phase 4Recruiting103 enrolled

Real-World NeuroModulate: Investigating Non-Invasive Brain Stimulation for Neuropsychiatric Disorders at TUM

NCT07420322Recruiting100 enrolled
View all 179 trials on ClinicalTrials.gov

Technical Information (LOINC Codes)

Standardized laboratory codes for this biomarker

62292-8Primary
25-Hydroxyvitamin D3+25-Hydroxyvitamin D2 [Mass/volume] in Serum or Plasma
ng/mL
1989-3
25-hydroxyvitamin D3 [Mass/volume] in Serum or Plasma
ng/mL
68438-1
25-Hydroxyvitamin D3+25-Hydroxyvitamin D2 [Moles/volume] in Serum or Plasma
nmol/L
14635-7
25-hydroxyvitamin D3 [Moles/volume] in Serum or Plasma
nmol/L
55814-8
25-hydroxyvitamin D3 [Moles/volume] in Cord blood
nmol/L
83070-3
25-Hydroxyvitamin D3+25-Hydroxyvitamin D2 [Mass/volume] in Serum or Plasma by Immunoassay
ng/mL
83071-1
25-Hydroxyvitamin D3+25-Hydroxyvitamin D2 [Moles/volume] in Serum or Plasma by Immunoassay
nmol/L
95594-8
25-hydroxyvitamin D3 [Mass/volume] in Capillary blood
ng/mL
95595-5
25-Hydroxyvitamin D3+25-Hydroxyvitamin D2 [Mass/volume] in Capillary blood
ng/mL

Available Lab Tests

Order tests that measure this biomarker

advanced cardiovascular health comprehensive

$526.57

advanced heart health comprehensive

$489.94

Vitamin D, 25-Hydroxy

$35.59
Results in 1-2 business days

Find Specialists

Doctors who commonly order this test

Dentist
Oral and Maxillofacial Pathology
Internal Medicine
Endocrinology, Diabetes & Metabolism
Neurology
Psychiatry