Story perspectives
Bright Yellow Urine: Harmless Riboflavin or Health Warning?
10/31/2025
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Story summary
- Bright neon-yellow urine often results from excess riboflavin (vitamin B2) taken as supplements.
- Riboflavin is naturally yellow and fluorescent, and it is flushed out when taken in excess.
- While bright yellow urine is typically harmless, red or dark brown changes may indicate serious health issues and warrant medical advice.
- Other substances, including vitamin C, beta-carotene, and beetroot, can also alter urine color.
