I guess we need to define rejuvenation then. the biomarker tests in the experiment each measures one tiny piece of the physiological state which, depending on the direction in which the marker changed, indicates a physiological state that more closely resembles that of a younger organism. I'm not sure (maybe i'm wrong) there is a universally accepted definition of rejuvenation. and there certainly isn't any single market that proves rejuvenation. It's simply too complex for that to ever be the case. It's more like pick your basket of markers of aging and test them over a period of time and see which way they are heading. I personally think any markers of rejuvenation has to include those that measure the physiological dirvers of age -related disease and deterioration such as insulin sensitivity, fibrotic markers, resting heart rate, muscle stem cells, mitochondrial markers, cholesterol trajectory, cardiac output efficiency, C-reactive protein, just to name a few out of a million. In the study, muscle anabolism vs catabolism is in fact a good aging biomarker
The problem with the biomarkers used in the experiment is that they can't prove rejuvenation. For example we know exercise improve lots of biomarkers, yet it does not rejuvenate you, or you could exercise your way to immortality.On Tue, Jun 30, 2020, 01:50 Frank Garcia <fgarc...@gmail.com> wrote:I don't know too much about the epigenetic tests however it might be useful for you to take a look at the biomarker tests that were used in the experiment that I posted which started this discussion. They did pretty rigorous testing of multiple systems and tissues to determine efficacy.
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