The study published in the British Medical Journal assessed the evidence behind 431 performance enhancing claims in adverts for 104 different sports products including sports drinks, protein shakes and trainers.
In case where evidence from adverts was not clear, researchers asked for information from various manufacturers. It found only 2.7 per cent of the information supplied to be of high quality and at low risk of bias.
“This absence of high quality evidence is worrying,” researchers said.
Also, no substantial evidence was found to suggest that liquid is any better than solid carbohydrate intake.
Follow our WhatsApp channel
