Bryan Johnson· Author
One one interesting thing about um looking at sperm too, just like bone marrow density or any of these other outcome metrics is that we're getting a longer look at your health, right? So that the temporal relationship is much is much broader as opposed to like you know we can measure a lot of these things by just checking serum levels which we do like CRP looking at inflammation or glutathione levels to try to get a sense of reactive oxygen species but that is like a single time point that can change over a matter of hours whereas it's when we look at sperm or or bone mineral density we're looking at a much longer time point of months to really like sometimes even years of your overall health.