The idea that you could just take a pill one time and be "protected from aging" or something sounds ludicrous. Would be interested to see people reproduce these results and have them supposedly transfer over to humans. Humans are a much longer time scale.
I always go back to the SENS concept of having several different problems to solve related to built up damage, cells that won't die, etc.
The basic hypothesis is that cells operate in two modes, one storing up stuff in times of plenty, and a second mode which uses up the stores and cleans up, active during lean times. mTor is supposed to be the chemical signal which indicates which mode to act in; it's inhibited by both fasting and rapomycin.
I always go back to the SENS concept of having several different problems to solve related to built up damage, cells that won't die, etc.