Know Your Blood Parameter : Vitamin B2 (Riboflavin)

1. Parameter Name

Vitamin B2 (Riboflavin)

2. Test Type

Blood or urine (measured via erythrocyte glutathione reductase activity)

3. Normal Range

1–2.5 µg/dL (may vary by lab)

4. High Levels Indicate

Uncommon and generally non-toxic; may occur with supplements.

5. Low Levels Indicate

Deficiency may impair energy metabolism, skin, and eye health.

6. Why It's Tested

To identify nutritional deficiencies or investigate symptoms of fatigue, mouth sores, or skin issues.

7. Associated Symptoms (if abnormal)

Cracks at mouth corners, sore throat, swollen tongue, skin rash.

8. What To Do If Abnormal

Increase dietary intake or consider B-complex supplementation.

9. Common Conditions Related

Ariboflavinosis, chronic malnutrition, alcoholism.

10. Nutrition or Lifestyle Connection

Present in milk, eggs, green vegetables, nuts, and whole grains. Destroyed by light.

11. References (APA Format)

NIH Office of Dietary Supplements. (2022). Vitamin B2 (Riboflavin). MedlinePlus. (2023).