We usually associate addiction with bad things like smoking, alcohol and gambling. But it's possible to be addicted to exercise, too.
Here are some of the more popular sports supplements on the market today, separated into categories based on how effective and safe research shows they are.
There's not enough evidence that sports drinks are any better at hydrating you than water.
From a social media post that cracked open a decades-old abuse scandal in the UK and Australia, through to tracking asylum seekers, social media can be vital in breaking investigative news stories.
Protein supplements are all the rage for fitness fanatics and those hoping to boost their muscles – but do they contain as much protein as they claim to?