Grapefruit juice to be consumed with caution for people on certain medications (eg statins but also a lot more) or with certain conditions. "Grapefruit juice can block the action of intestinal CYP3A4, so instead of being metabolized, more of the drug enters the blood and stays in the body longer. The result: too much drug", see FDA and find lots of reporting on web search.
Grapefruit juice to be consumed with caution for people on certain medications (eg statins but also a lot more) or with certain conditions. "Grapefruit juice can block the action of intestinal CYP3A4, so instead of being metabolized, more of the drug enters the blood and stays in the body longer. The result: too much drug", see FDA and find lots of reporting on web search.