We use cookies to help provide you with the best possible online experience. Please read our Privacy Policy for information about which cookies we use and what information we collect on our site. By continuing to use this site, you agree that we may store and access cookies on your device.
A protein has been added to blood cells that appears to make them young again—cue the speculation on whether this substance is, at long last, a way to reliably reverse some of the effects of aging.