09 Jul 2015 Blackmores Institute Carnitine supplement boosts muscle stamina in animal studies 09 Jul 2015 Share Share on LinkedIn Share on Facebook Share on Twitter Share on Google+ Share on Pinterest News Rodents given a carnitine supplement have a better exercise tolerance and stamina to ones who weren’t, new data shows, leading the US researchers to believe there may be a way to improve exercise tolerance and, by extension, its positive effects, in humans. The benefits of exercise are well known, but physical fitness becomes increasingly difficult as people age or develop ailments, creating a downward spiral into poor health. × To continue reading this article, please Log In or Sign Up for access.