|Telomeres protect the ends of our chromosomes|
Dr. Blackburn learned that a sample of DNA can provide enough information to learn about a person's health. People with longer telomeres were biologically younger, even if not chronologically. Those with short telomeres were three times more likely to have cancer. Cancer cells have activated telomerase that repairs the vanishing telomeres producing a cell that never dies. Cancers cause problems because they have too much telomerase. Every cell has telomeres, but not every cell has telomerase. This is so that cells can naturally die out of the way, but cancer messes that system up.
So having too little telomeres can cause the problems of aging. Too much telomerase can cause the problems of cancer. Then the healthiest has to be right in the middle. So their might not be a magic potion to reverse aging and rebuild our telomeres. At least not without significant risks. Instead, have have to protect the telomeres we have. Reduce the stress we put on our cells and let them live out their full potential. You won't live forever, but you might make it a long time. Besides, who wants to live forever?