Carambola, star fruit or Kamarakh is the fruit grown in many parts of India and is eaten by many as it  lowers cholesterol ; ward off winter colds and flu because of its high vitamin C content, reduces obesity as it is high in fiber and cures anemia as it is also high in iron.

But it should not be taken by kidney stone patients as it is in high oxalic acid. Also like the grapefruit, it is a potent inhibitor of seven cytochrome P450 isoforms enzymes which are significant in the first-pass elimination of many drugs. The consumption of carambola or its juice in combination with these drugs can significantly increase their effective dosage within the body. The drugs are statins (lowers cholesterol), diazepam (sleeping drug), cyclosporine or tacrolimus (transplant drugs).