Health knowledge made personal
  Nevertheless, everyone lost muscle. The question then was how much. It turned out that the higher one's endogenous testosterone level, the less muscle mass one lost over time (apparently their skeletal muscle didn't believe in avoiding double negatives). To be clear, there was no association w/physical function, although it would correlate with the observation that higher testosterone is associated with less frailty and lower risk of falls.  But what's most impressive is the conclusion arrived at by the authors: "Endogenous testosterone may contribute to healthy aging." Of course, the next step is to determine whether exogenous or supplemental testosterone will achieve the same effect . . . In the meantime, don't forget all the other modifiable tenets that affect our health. Follow @alvinblin 
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