What is vitamin B2 used for in the body?

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

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

Is B2 deficiency common?

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

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

Vitamins and Nutrients

A blood test that measures riboflavin (vitamin B2), a B vitamin your body uses to turn food into energy.