Drink however much Grapefruit juice you want. 15 mg isn't a whole lot. You will be fine. But if you don't like it, probably a half cup minimum to get your enzymes inhibited.
Drink however much Grapefruit juice you want. 15 mg isn't a whole lot. You will be fine. But if you don't like it, probably a half cup minimum to get your enzymes inhibited.