Bryan Johnson's baseline follistatin blood level was below 10 before gene therapy, and he expects it to be in the 20s or higher post-treatment.

“My speed of aging has dropped to 0.64 (a personal best).”

“My muscle mass is up by 7% (already in the 99th percentile)”

“before the therapy it was below 10 and so we're hoping there's somewhere in the 20s maybe even higher range so we'll see in 2 days where they're at”

“okay should do right which one you going to go after that one in the middle good stick open thank you look at that flow rate all right I just had my blood drawn uh because I did my first gene therapy 14 days ago Volo Statin I had two shots uh in my sides my obliques”