Vitamin D (25-OH)

25-hydroxy vitamin D is the right measure of your vitamin D stores. Under 20 is deficient, 20–30 insufficient and 30–100 adequate.

Signs of deficiency: bone and muscle aches, tiredness, hair loss and frequent colds. Your doctor sets the dose from the result, and the test is repeated after 3 months of treatment.

Preparation before the test

• No fasting needed; it can be done any time.
• If you take vitamin D, tell your doctor the dose and since when.

This information is for awareness only and is not a substitute for medical advice — your treating doctor interprets the result for your case.