A healthy 70-year-old is physiologically different from a healthy 30-year-old, and society should consider tolerance for risk in healthspan interventions.

“I think that is we need as a society and and within the scientific community to have a discussion about this because I think that we need to recognize that a healthy 70 year old is not the same as a healthy 30 year old right and we know what's gonna happen if we don't do anything about aging so my personal view is that there should be a tolerance for some level of risk if the outcome is going to be 10% 20% 30% more time spent in good health that's that's a discussion that we haven't had either at the regulatory level or at the society wide level but I think we need to have”