Nutrients & foods

Vitamins & minerals

Vitamin B2 (Riboflavin)

Forms enzyme helpers used in energy metabolism.

Updated September 17, 2026 · Educational reference

What it does

Forms enzyme helpers used in energy metabolism.

Possible deficiency symptoms

Deficiency may cause cracks at the corners of the mouth, sore throat and skin changes.

Food sources

Milk; yogurt; eggs; meats; almonds; fortified cereals.

Supplement forms

Riboflavin and riboflavin-5-phosphate.

Before taking a supplement

Bright-yellow urine can follow supplementation; it does not show whether a deficiency was present.

Questions for your visit

Could my diet, medicines, absorption or another condition explain my concern? What evidence would support treatment, and how would we check whether it helps?

Names you may see

Vitamin B2 (Riboflavin) · Riboflavin

Sources & perspective

This is an editorial adaptation of the Purser Wellness nutrient reference app. Purser teaching connections are labeled separately from clinical interpretation. Private cases and individual treatment protocols are not reproduced.

Use the public resources below for additional context.

NIH Office of Dietary Supplements: Vitamin B2 (Riboflavin)