Singapore General Hospital will NEVER ask you to transfer money over a call. If in doubt, call the 24/7 ScamShield helpline at 1799, or visit the ScamShield website at www.scamshield.gov.sg.

Help Us Improve Your Experience:

We’d love to hear from you! Rate the SGH website and share your feedback so we can enhance your online experience and serve you better. Click here to rate us

Home Our Specialties Pathology Pathology Lab Services 25 HYDROXYVITAMIN D TOTAL, SERUM

25 HYDROXYVITAMIN D TOTAL, SERUM

Pathology Laboratory Services

Lab Disciplines (Special instructions)

Test Request Media Order Forms

Sample Collection

Sample Collection Services

Sample Labelling and Despatch

Laboratory Reports

Materials and Supplies

Quality Programmes, Certification and Accreditation

National Proficiency Testing Scheme

Criteria for Unacceptable Samples

Critical Test Results and Laboratory Values

Panel Tests/Profiles

<Back to Pathology

Lab Section Category	Clinical Biochemistry View write-up
Specimen Required	5 mL plain blood
Indications	For diagnosis of Vitamin D deficiency and monitoring of response to Vitamin D therapy
Method	Liquid Chromatography - Tandem Mass Spectrometry (LC-MS/MS)
Test Results	A profile comprising of 25 Hydroxyvitamin D2, D2 and Total will be reported: (1) 25 Hydroxyvitamin D3 (2) 25 Hydroxyvitamin D2 (3) 25 Hydroxyvitamin D, total (D3+D2)
Reference Interval / Value	Deficient < 20 ng/mL Vitamin D supplementation to a level above 30 ng/mL may be appropriate for at-risk individuals on anti-osteoporosis therapy. Levels above 50 ng/mL may be associated with potential adverse effects.
Turnaround Time	Mean = 5 days, Range = Up to 7 days
Day(s) Test Set up	Monday - Friday