Do i need to start geritol the day of my cycle or can i start before?

Geritol: Geritol (http://www.geritol.com/ ) is a brand of multivitamins. As such, they're meant to be taken daily w/o regard to your cycle. So it really doesn't matter. Just do it. Well, that's assuming that you believe that multivitamins will make a difference (although no such research evidence exists yet). Instead, focus on eating healthy, exercising regularly & getting enough quality sleep.