Grapefruit extract comes from the peel or fruit flesh and contains naringin and limonoids. People take it to support immune function and antioxidant defenses.
You can find it in capsules, liquids, or powders. Take it with meals to aid digestion.
Grapefruit extract interferes with liver enzymes that break down many medications. This can lead to dangerously high drug levels. Statins, some blood pressure drugs, and certain anxiety medications are affected. Talk to a doctor before using grapefruit extract if you take prescription drugs.