Question 1

What is vitamin B2 used for in the body?

Accepted Answer

It helps convert food into energy and supports red blood cell production and growth, per MedlinePlus.

Question 2

Do I need to fast?

Accepted Answer

The Quest preparation states overnight fasting is required, and avoiding vitamin supplements for 24 hours beforehand is preferred.

Question 3

Is B2 deficiency common?

Accepted Answer

NIH and MedlinePlus indicate it is uncommon in the United States because riboflavin is plentiful in the food supply.

Question 4

Can a normal result rule out a deficiency?

Accepted Answer

A result inside the reference range suggests adequate status in that sample, but interpretation should be done with a clinician.

Vitamin B2 (Riboflavin) Test