Vitamin a (retinol)

This is an important test that can be used to detect Vitamin A deficiency or toxicity.

Venous blood
1 tests included
7 days turnaround



About Vitamin a (retinol)

What is vitamin A?

Vitamin A is an essential vitamin for vision, skin health, bone formation, immune function, embryonic development and reproduction. The body is unable to produce its own vitamin A but it is found in many dietary sources. Retinol is the most common active form of vitamin A and is only found in animal products including cheese, eggs, oily fish, dairy and organ meat such as liver. The antioxidant form of vitamin A, carotenoids, is found in plant-based products such as carrots, pumpkins and sweet potatoes. Vitamin A deficiency is most common in pregnant women, preterm infants, people living in developing countries and people with malabsorption conditions such as Crohn’s disease. Inadequate levels of vitamin A typically first impair night vision. Consumption of high levels of vitamin A may also affect your health including weaker bones, skin irritation, dizziness, headaches and death.

Why take the test?

This test measures the level of vitamin A in the blood and can be used to detect vitamin A deficiency or toxicity.


What's tested


How it works



Purchase your Kit

Just order a test online and get your kit delivered right to your door unless you are ordering a COVID-19 Fit to Fly test where you will be given appointment options to attend our clinics across the United Kingdom for a nose and throat swab PCR test at the checkout stage.



Take your test and post

Follow our simple instructions to take your sample and post back the enclosed prepaid envelope to our accredited lab for processing. We also offer home or workplace visits by a qualified nurse. For COVID-19 Fit to Fly tests you must attend one of our partner clinics for our trained collection officers to take your sample. You will then have the results emailed to you.



Get results directly to your dashboard

You will receive an email notification from our medical team when your results are available on your secure personalised health dashboard.