Vitamin B2 (Riboflavin): normal range and what it means
Riboflavin — supports energy production.
Normal range
Adult reference range.
- Low< 4 µg/L
- Normal4 – 24 µg/L
- High≥ 24 µg/L
What it measures
Riboflavin, used by the enzymes that turn food into usable energy and that recycle other B vitamins. Outright deficiency is uncommon outside poor intake.
What moves it
Dairy, eggs, meat and fortified cereals. Genuine deficiency is uncommon where diet is varied.
How to bring it into range
Dairy, eggs, almonds and fortified grains cover it easily. It is water-soluble, so excess is simply excreted.
How fast it responds
Two to four weeks.
Also reported as: riboflavin · b2
See where your own value lands
Upload a lab report and HealthOS reads all 88 markers, personalises every range to your sex and age, and tells you which ones actually need attention. Free, no account needed.
Check my blood testGet this marker explained for your own numbers
We’ll send you a short guide to reading this marker in context — what to check alongside it, and when a value is worth acting on.
One email about this marker. No spam, unsubscribe anytime.
Common questions
- What is a normal Vitamin B2 (Riboflavin) level?
- Normal: 4 – 24 µg/L. Adult reference range.
- What does a high Vitamin B2 (Riboflavin) mean?
- A value above the reference band means Vitamin B2 (Riboflavin) is outside the range typical for a healthy adult. A single reading is rarely conclusive on its own — what matters is the trend across draws and the other markers around it, which is why HealthOS reads the whole panel together rather than one number at a time.
- How do I improve my Vitamin B2 (Riboflavin)?
- Dairy, eggs, almonds and fortified grains cover it easily. It is water-soluble, so excess is simply excreted.
More in Vitamins & Minerals
Reference ranges are general-population guidance compiled from common clinical laboratories, not a diagnosis. Lab-to-lab ranges differ. Always read your results with your doctor.