Vitamins & minerals
Vitamin D
Also written as 25-hydroxyvitamin D, 25-OH.
Core panel — run every month
What it indicates
The storage form of vitamin D, which reflects both sunlight exposure and dietary intake.
Why a series helps
It follows the seasons closely in Ireland and the UK, so a year of readings shows a shape that any single test would miss.
What this page does not tell you
What a particular Vitamin D result means depends on you: your history, your medication, why the test was taken. Ziro does not interpret results for individuals and does not diagnose. If something in your results warrants a conversation, that conversation is with a doctor, and your results are downloadable so you can bring them.
Others in vitamins & minerals
Micronutrients and the proteins that store and carry them.