Final answer:
Consuming excess vitamin B2 (riboflavin), which is a water-soluble micronutrient, can cause urine to turn bright yellow due to the excretion of unused amounts and the presence of urochrome.
Step-by-step explanation:
Consuming excess of specific micronutrients can cause your urine to turn a bright yellow color. The micronutrient responsible for this is the B-complex vitamin, specifically vitamin B2 (riboflavin). Riboflavin is a water-soluble vitamin, which means that your body does not store it and excretes excess amounts in the urine.
This is why urine may turn a bright yellow color when you consume more riboflavin than your body needs. The yellow pigment is largely due to the presence of urochrome, a byproduct of hemoglobin breakdown.
It is important to note that while a change in urine color might be due to vitamin intake, it can also indicate dehydration or the presence of certain substances, such as foods or medications. Additionally, pathological conditions, such as liver dysfunction causing jaundice, may present with changes in urine color. Therefore, any persistent change in urine color should be discussed with a healthcare provider.