Bryan Johnson — searchable YouTube transcripts & AI Q&A

I Did Mushrooms for Science, Pt. 2

Bryan Johnson argues that psilocybin, when taken in controlled, high doses, can measurably improve markers of biological aging, including blood sugar control, inflammation, and brain flexibility. He reports that his mean blood glucose dropped by 8% and his estimated HbA1c fell from 4.7 to 4.4 after a single dose, and that his brain showed increased entropy, resembling a younger brain. However, he cautions that these are first-in-human observations that need replication and does not recommend others try psychedelics without medical supervision.

Can I dunk at 49?

Bryan Johnson argues that dunking a basketball at 49 is a more meaningful biomarker than traditional metrics like VO2 max, because it's visible and relatable to more people. He emphasizes building a strong foundation first, noting that tendons take 8-12 weeks to adapt compared to 3-4 weeks for muscle, and his trainer estimates an 80-85% chance of success given his lean physique and disciplined nutrition and sleep.

Meet The World's Most Measured Woman

Bryan Johnson's ambitious experiment measures Kate Tolo across 1,900 biomarkers to understand the female body, highlighting measurement challenges compared to men.

Let's talk about my clone...

Bryan Johnson explains how he reversed his cells to an embryonic-like state to potentially rebuild his body and cure diseases.

international travel is a biological insult to your body

Bryan Johnson explains how international travel and jet lag biologically insult your body, affecting sleep, glucose, and brain function.