I have to start geritol the day of your cycle or can you start before? what do i do?

Ask your doctor: Truthfully, it really doesn't matter. We used to associate the elderly w/Geritol. But presumably you're female (you didn't describe your gender although you mentioned your cycle) so you probably lose a bit of iron w/your menses, which is where Geritol comes in. Realistically, if that's the case, it really doesn't matter when you start, since we don't cycle vitamins as much as take them daily.