Grapefruit Juice

T NATION | Nutsack-Rated Nutrition:

"If, however, you're a supplement kamikaze and what to maximize the effects of your supps, take them with 8-12 ounces of grapefruit juice. I urge you not to do this with your prescription meds, though, as grapefruit juice might raise the level of the drugs in your bloodstream to unsafe levels."