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.
New South Wales had already laid claim to the title, arguing that Hyams Beach at Jervis Bay has the whitest sand in the world, purportedly backed up by Guinness World Records. As it turned out, both claims were false. Guinness World Records has no such category, and the whitest beach (as we found) is actually elsewhere. Hyams beach in Jervis Bay, NSW, has been rumoured to have the whitest sand in Australia. Kristina Kl./Flickr, Author provided. So we drafted terms of reference, and the search for Australiaâs Whitest Beach began.