The research team administered AP39 to some worms from birth, and to others after reaching adulthood. They found that this compound improved the integrity of mitochondria — the ‘power house’ of cells, which produces our cells’ energy, and kept the worms’ muscles active and moving, even well into old age, and when given mid-way through their life-course. The research concludes that targeting H2S specifically to the energy-generating machinery of cells (mitochondria) could one day be used as a healthy aging therapeutic.