A good friend just underwent a kidney transplant and the anti-rejection drugs are known to interact with grapefruit, so while he is of course incredibly grateful for his new kidney, he is a little sad that he will literally never have grapefruit again.
I know this is a weird one but I'm curious if anyone knows of good flavor extracts that contain absolutely no grapefruit but provide a credible grapefruit flavor so I can make him something grapefruity, yet medication-safe.