Why is grapefruit not allowed in US?

Grapefruit is not banned in the U.S., but it is known to interact with certain medications, potentially leading to harmful effects. Compounds in grapefruit can inhibit enzymes that metabolize various drugs, increasing their levels in the bloodstream and heightening the risk of side effects or toxicity. As a result, healthcare providers often advise patients taking specific medications to avoid grapefruit to ensure their safety.