There were at least some studies that linked faster metabolism to shorter lifespans. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3100751/ http://www.ncbi.nlm.n

There were at least some studies that linked faster metabolism to shorter lifespans. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3100751/ http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3100751/ Higher Energy Expenditure in Humans Predicts Natural Mortality I personally am trying to somewhat keep my metabolism slower by eating less often, and less in general, plus intermittent fasting. But of course everything is still open for debate.