When a Vitamin B2 (riboflavin) tablet is added to water, it begins to dissolve, releasing riboflavin into the liquid. Riboflavin is naturally fluorescent, meaning it can absorb light—especially ultraviolet (UV) light—and re-emit it, producing a bright, yellow-golden glow. This glowing effect gives the water a striking appearance, often described as gold-like or neon yellow! The vibrant color and glow are due to the unique molecular structure of riboflavin, which interacts with light in a visuall