Understanding Vitamin B2 (Riboflavin): Normal vs Optimal Ranges

?What is Vitamin B2 (Riboflavin)?

Vitamin B2 (riboflavin) is a water-soluble B vitamin essential for energy metabolism, cellular growth, and antioxidant defence. It acts as a cofactor for flavin enzymes involved in the oxidation of fats, carbohydrates, and proteins. Riboflavin is not stored in the body in significant amounts, making regular dietary intake important.

!Why It Matters

Adequate B2 levels are crucial for mitochondrial function and energy production. Low riboflavin may suggest impaired metabolism and increased oxidative stress, while deficiency can be associated with fatigue, vision problems, and compromised immune function. Monitoring B2 status helps identify nutritional gaps that could affect overall energy and cellular health.

Reference Ranges

Lab normal ranges may vary between laboratories. Optimal and longevity targets are based on research literature and should be interpreted with your physician.

Symptoms of Imbalance

• Persistent fatigue and low energy
• Cracked or sore lips and mouth corners
• Red, itchy, or inflamed eyes
• Skin irritation or dermatitis
• Numbness or tingling in extremities

How to Improve Your Levels

• 1Increase intake of riboflavin-rich foods: almonds, mushrooms, eggs, cheese, and lean meats
• 2Include whole grains and fortified cereals in your diet
• 3Consume green vegetables such as spinach, broccoli, and asparagus
• 4Consider B-complex supplements if dietary sources are insufficient
• 5Avoid excessive heat during food preparation, as riboflavin degrades with cooking
• 6Ensure adequate protein intake, as B2 absorption is linked to protein metabolism

When to Test

Test vitamin B2 levels if experiencing unexplained fatigue, mouth ulcers, or vision problems. Screening is recommended for vegetarians, vegans, individuals with malabsorption disorders, and those taking certain medications. Consider testing annually as part of comprehensive micronutrient assessment.

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