Thank you for your kind comments and your interest. Please note
that clinical trials are not the only way to increase healthspan.
For example, elimination of smoking for healthspan extension was
justified by epidemiological studies, rather than by clinical trials.
Epidemiological studies of human longevity is a clever way to analyze the
results of already done natural experiments on lifespan
extension, which allows to save time and resources. For
example, some people survive to age 65 years, and they are in a such good
health that their remaining life expectancy is beyond 35 years at this
age. By studying predictors of such remarkable healthspan, you may get
deeper insights for healthspan extension.
We have noted that you carbon-copied your comment to distinguished
experts, so we attach our new peer-reviewed study to our response, so
that they could comment on it too.
Happy New Year 2015 !