It is common for urine to be a brighter yellow color when taking My Spectrum Heroes Multivitamin Mineral Plus due to the B vitamins. In particular, vitamin B2- Riboflavin, (the “flavin” portion comes from the Latin word “flavus” meaning “yellow”.) If it is extremely bright, this could indicate your child is not drinking enough water. Drinking plenty of water can dilute this bright color if it is bothersome.