When Coca-Cola wanted to experiment with a supposedly healthy green-tea-flavoured drink, it targeted young Japanese women first.

ECONOMIST: The fad for functional foods

They also worked to make an energy drink, an electrolyte drink, and a melatonin shot aimed to promote healthy rest and sleep.

FORBES: Miami Heat's Mike Miller Launches 'Let it Fly' Energy Drink Publicly

Rats with tumours were also less eager to drink sugar water, a substance that usually attracts the appetites of healthy rats.

BBC: Tumour make-up 'fuels depression'