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Vitamin A

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Also known as: Retinol
Formal name: Retinol
Related tests: Complete Blood Count (CBC), CMP, Vitamin B12 and Folate, Vitamin D, Iron Tests, Retinol-Binding Protein

At a Glance

Why Get Tested?

To detect vitamin A deficiency or toxicity

When to Get Tested?

When a person has symptoms suggesting a vitamin A deficiency or excess, or is 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.