Why Your Urine Turns Highlighter Yellow After Vitamin C Drinks (Most People Get This Wrong)! If you've ever taken Redoxon, Berocca, or any soluble Vitamin C drinkand suddenly your urine looks like Your pee indicates how healthy you are. Here's a guide. : r Biohackers Why Your Pee Turns Bright Yellow from Certain Supplements Why Is My Urine Yellow After Taking Vitamin B? The standard color of your urine is referred to by doctors as urochrome. Urine naturally carries a yellow pigment. When you're staying hydrated, your urine will be a light yellow, close to clear color.