Proceeds from website advertising help sustain Lab Tests Online. AACC is a not-for-profit organization and does not endorse non-AACC products and services.

Vitamin A

Print this article
Share this page:
Also known as: Retinol
Formal name: Retinol

Board approvedAll content on Lab Tests Online has been reviewed and approved by our Editorial Review Board.

At a Glance

Why Get Tested?

To detect vitamin A deficiency or toxicity

When to Get Tested?

When you have symptoms suggesting a vitamin A deficiency or excess, or are at risk for a deficiency

Sample Required?

A blood sample drawn from a vein in your arm

Test Preparation Needed?

Fasting is required and no alcohol should be consumed for 24 hours before sample collection.