Am taking a multi vitamin now,but concerned about the neon yellow of my urine. It's extremely bright

It is caused from the potassium. It is advised to take a multivitamin with up to 100% for all of the ingredients, especially vitamin A. If you have more than 300% of any of the ingredients I would advise you to stop taking it but if you insist on taking a multivitamin try to find one with less powerful vitamins.