It is more about growing from within that is needed, we need to connect with nature. Staying physically fit is important, but so also is keeping mentally and emotionally fit. We need to handle stress well and need to let go of our worries at the end of each day. Each of us, have our difficult or challenging experiences, but it is our positive response to these difficulties and challenges that enable us to carry on.
So there may be a fountain of youth after all, but not exactly as we envisioned it. As the "ageless" Sophia Loren has said, "There is a fountain of youth: it is your mind, your talents, the creativity you bring to your life and the lives of people you love. When you learn to tap this source, you will truly have defeated age."
Now that's a fountain I think we can all dip into....