Yamanaka factors can reset cells but full reprogramming also erases what makes a cell a skin cell, muscle cell, or neuron. The longevity challenge is resetting age while preserving identity. Genetic circuits may offer more precise control, but this is still a research frontier. Full video: https://youtu.be/yzjCdz1jz-g Oisín Biotechnologies: https://www.oisinbio.com/