We know how the expression of genes changes during C.Elegans ageing. [1]
We know how different medicine changes this expression.
We know some biomarkers of ageing and if we improve them we can say we've made C.Elegans younger.
So there is no problem at all: we need just to make experiments with different geroprotectors [quercetine, reveratrol and other] and to choose such their combination which is most appropriate for rejuvenation.
The same can be done with mices.














