Vitamin B12 Stains Your Undies
Normal urine can range in color from a light yellow to an amber. Taking a B12 supplement, vitamin B complex or multivitamin containing vitamin B12 will often turn urine dark yellow or orange. This stems from the yellow coloring in the over-the-counter supplement that your body excretes.
Consuming large quantities of foods rich in B12 (shellfish, liver, mackerel, beef) can cause your urine to become a bright green color. Can the discoloration be prevented? How is B12 deficiency linked to cardiovascular incidents?