Will life extension therapies be accompanied by unknown diseases or side effects?

Will life extension therapies be accompanied by unknown diseases or side effects?

It's quite likely that some of these therapies will have side effects that have to be addressed. And really, in a sense, it's a matter of terminology whether we call the addressing of the side effects part of the therapy or not. For example, within the SENS program, the approach I think we're going have to take to combat cancer thoroughly enough to actually really defeat it is something that will inherently have a lot of very big side effects. And the whole structure of my approach discusses where to address those side effects.