Perhaps the chief purpose of a philosophy or religion is to help us understand the meaning of death and why we are alive. Without understanding where we have come from and where we are going, we cannot establish our own sense of identity to the fullest. Aging and its symptoms can, if noting else, prompt us to seek rejuvenation. Ultimately, that rejuvenation can be fount not in forestalling symptoms but in embracing a larger understanding of our own lives, which Buddhism elucidates.
(Credit Daisaku Ikeda for the philosophy)