The adage goes that an apple a day keeps the doctor away - but it could be closer to 100 apples according to a new study.
People who overdo exercise often fall victim to illness but American researchers found that giving them quercetin, which is found in apples, could help protect them.
DARPA, the Pentagon's research arm, has been sponsoring studies into whether quercetin could be used to help protect US troops.
The latest trial saw 40 male cyclists either given one gram of the flavenoid every day - equal to eating 100 apples - or a placebo for three weeks.
According to an article in the New Scientist journal, the cyclists spent a three-day period training at maximum intensity for three hours a day. Two weeks later, nine of the cyclists in the placebo group had chest infections while only one of the quercetin group was ill.
Source - Daily Mail