Larry was a 65 year-old healthy man who underwent biometric testing before and after taking the supplement TA-65. He changed nothing else in his lifestyle and yet his lung functioning went from a very respectable 3.8 liters to 4.6 liters after only 15 months.
If you were copying taped music but could only press the record button on a leader-less duplicate after pressing the play button on the original, you would have a perfect model for the telomere theory of aging.