@mrmacabre but a nerve can be replaced. The argument put forward by the supporters of Amla relates to the atypical action of mitochondria, where these power centers of the system are producing ATP more slowly than needed to replace dead cells with newly manufactured cells. The only research that I have seen is in rats, but here they did claim some success, however, how this relates to humans remains to be seen. There needs to be controlled human clinical trials to determine to what extent this success translates in humans.