As an anti-aging drug, the secret of rapamycin prolonging life is that it can block mTOR channel, which is also one of the main switches that control the process of cell growth and reproduction  When food is sufficient, this channel obtains signals from hormones and nutrients to enable cells to absorb nutrition and grow, but by-products that stimulate cell aging will be produced in the process of cell metabolism and growth  When food calorie intake is limited, this channel can send a signal to stop cell growth to delay aging
Rapamycin can delay aging and make people more vulnerable to bacteria and viruses.
 Rapamycin may be the most effective anti-aging drug found so far