Bryan Johnson· Author
The HSP72 finding is also weaker than the "~50%" headline suggests. n=13 for the blood draws. Mean rise was 48.7% ± 53.9%, so the SD exceeds the mean: by a normal approximation, ~18% of subjects had no rise or a decrease. The absolute change was small (plasma went from 2.7 to 3.8 ng/mL).