A dietary supplement makes old mice youthful, but will it work in people?
<i>"In the latest advance, biologists reported on Thursday that a molecule already sold by supplement makers (even as scientists scramble to understand it) restored
youthfulness to blood vessels in 20-month-old mice, an age comparable to 70 years in people..."</i><p>So which supplement is it?<p>If it's already sold by supplement makers, have there been any reports of similar effects in people?