As doctors warn it can cause a dangerous reaction with a host of common drugs... 1  Researchers warn that grapefruit reacts with many medicines. 2  The fruit can cause devastating side-effects from stomach bleeding to kidney problems. 3  Doctors say the public is ignorant to the dangers and putting themselves needlessly at risk.
According to the definition of the question (based on light reflection and not light emission), a well-polished mirror is the the whitest substance on earth. The main reflection layer is usually made out of silver.
Hi Richard! Perhaps I may have the answer to your question.I think the rarest thing in the world are actually leaving-things known as Albino person or animal.The albino person or animal were born without natural colouring matter in the skin and hair or fur,which is white and the eyes,which are pink in colour.