High riboflavin intake can make your urine a bright, almost fluorescent yellow. This is perfectly normal and nothing to worry about.
Riboflavin, also known as vitamin B2, is a water-soluble vitamin. Your body doesn’t store excess riboflavin; it excretes any that isn’t immediately used. This excretion accounts for the change in urine color.
- Dietary Sources: Riboflavin is found in many foods, including milk, eggs, leafy green vegetables, and organ meats. Increased consumption of these foods can lead to more brightly colored urine. Supplements: Taking riboflavin supplements also frequently causes intensely yellow urine. The amount of added riboflavin directly correlates with urine color intensity.
The intensity of the yellow color depends on how much riboflavin your body processes and excretes. Generally, the brighter yellow, the higher your riboflavin intake.
If you notice your urine is a bright yellow after consuming riboflavin-rich foods or supplements, it’s a sign your body is processing the vitamin. No action is typically required. The color should return to normal once your riboflavin intake decreases. If you’re concerned, consult a doctor or registered dietitian to rule out other possible causes of urine color changes.
While a bright yellow urine color from riboflavin is usually harmless, significant changes in urine color or any other accompanying symptoms warrant a medical evaluation.
