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  As we get older, especially men who are frail, testosterone replacement is a consideration to improve muscle strength and balance. Exercise, of course, is the best way to increase muscle strength and balance because it naturally increases growth hormone and testosterone levels. Overdoing testosterone levels can be a problem with aggressive behavior...

In a study out of Johns Hopkins University that was published in the December 2014 issue of the Journal of Molecular Biology, researchers found that the amount of mitochondrial DNA found in blood directly correlated with frailty and longevity 10-15 years before symptoms appeared. Patients were followed over 10-20 years looking at the amount of mitochondrial DNA...