> to see if they live longer. This is quite subtle, but whether or not people live longer is not the same as speed of ageing. Still, it could be argued that th

> to see if they live longer. This is quite subtle, but whether or not people live longer is not the same as speed of ageing. Still, it could be argued that this subtlety makes the title misleading, which is also "wrong" in a way. If metabolism is tied to speed of ageing (don't know if that is established or not) then the title would be technically correct.