B2 is what you need... also known as Riboflavin.

We've been asking for a while if B12 does the same thing, since its quite common that people think B12 instead of B2. I guess you answered that question! :rastasmoke:
suzieque Reviewed by suzieque on . Question on B-12 So i have a drug test for pre-employment in the morning. I'm a very light smoker, once every maybe 2 weeks. This only started about 2 months ago. I haven't smoked in about 21 days. I'm nervous about the test so I'm going to dilute it a little. But no matter how many of these b-12 vitamins i've been taking it will not turn my pee yellow. I'm peeing clear and that's no good. I don't really understand why it's not working. There 250 mcg each. I Just took 4, pee'd twice since then, Rating: 5