Vitamin D Test (25-Hydroxy)

Vitamin D Test (25-Hydroxy)

Category
Vitamin D
Sample
Blood sample taken from a vein in your arm
Reports () Terms & Conditions Report time varies with time of sample collection.
In 2 days
Fasting
No Fasting
Age
All Ages

What Is This Test?

Measures 25-hydroxy vitamin D, the main storage form of vitamin D and the best indicator of your body's vitamin D status.

Why this test is performed?

Detects vitamin D deficiency, which can cause bone pain, muscle weakness, fatigue and weak bones (osteoporosis, rickets). Also used to monitor supplementation.

Who should take this test?

Body aches, bone pain, fatigue, hair fall, low sun exposure, pregnancy and older adults.

Test Preparation

No fasting needed.

Medical disclaimer · for information only, not medical advice

This article is for general information and education only. It is not medical advice, does not create a doctor–patient relationship, and is not a substitute for consultation with a qualified doctor who has assessed your individual situation. Never delay seeking medical advice because of something you have read here.

In a medical emergency, call 112, or 108 for an ambulance where that service operates, or go to your nearest emergency department. If you are in mental health distress, Tele-MANAS is free and available 24×7 on 14416.

Read our Editorial Policy and Medical Review Process.

Frequently asked questions

Generally 30–100 ng/mL is considered sufficient, 20–29 insufficient and below 20 ng/mL deficient. Deficiency is very common in India despite abundant sunlight.

No fasting is needed. You can eat and drink normally unless your doctor has advised otherwise.

Blood sample taken from a vein in your arm.

Usually within 12–36 hours after the sample reaches the lab. You will receive the report online.

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