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  • Bryan Johnson
    Bryan Johnson @bryan_johnson

    Average American heart aging faster than the calendar

    Study with 14000 participants (age 30-79) using an online tool that converts heart disease risk into a heart age found:

    Ave US woman: heart 4.1 years older than calendar age
    Ave US man: heart 7 years older than calendar age

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    Jul 31, 2025 32 2 View on X
  • Bryan Johnson
    Bryan Johnson @bryan_johnson

    Most men think the average erect penis is 6.2 inches.
    It’s not. That data is self-reported.

    The actual global average is 5.36 inches (13.61 cm), according to a 2020 meta-analysis of 10 studies.

    Here’s how to collect your own penis size data, accurately.

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    Jul 31, 2025 50 3 View on X
  • Bryan Johnson
    Bryan Johnson @bryan_johnson

    Erection measuring protocol:

    1. Ensure you are fully erect.

    2. Place a rigid ruler on the top side of your shaft. Gently push it back until it touches the pubic bone (you may need to press through skin or hair).

    3. Read the length where the tip meets the ruler.
    Do not pull

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    Jul 31, 2025 28 1 View on X
  • Bryan Johnson
    Bryan Johnson @bryan_johnson

    @ConnerBean initially probably 5-7 hard core builders to figure out path

    Jul 31, 2025 0 0 View on X
  • Bryan Johnson
    Bryan Johnson @bryan_johnson

    Have been interviewing CEOs and CTOs. They're surprised when I tell them the goal here is to build health with the same fever pitch intensity as seen in AI.

    Ultimately it's the same thing.

    Jul 31, 2025 206 8 View on X
  • Bryan Johnson
    Bryan Johnson @bryan_johnson

    @AMAZlNGNATURE but it's so pale!

    Jul 31, 2025 31 1 View on X
  • Bryan Johnson
    Bryan Johnson @bryan_johnson

    My body screams at me after sitting for 45 minutes.

    Jul 30, 2025 1 0 View on X
  • Bryan Johnson
    Bryan Johnson @bryan_johnson

    @ID_AA_Carmack I'd love to do this with my body

    Jul 30, 2025 6 0 View on X
  • Bryan Johnson
    Bryan Johnson @bryan_johnson

    @BioProtocol we systematically plan out the tests weeks in advance and then determine best time and routine to ensure consistency of measurement

    Jul 30, 2025 4 0 View on X
  • Bryan Johnson
    Bryan Johnson @bryan_johnson

    Your blood, stool, saliva, and urine reveal your life habits…

    In the last 24 hours, I measured:

    blood:
    + ADMA/SDMA
    + F2-isoprostane
    + Creatinine ratio
    + 8‑OHdG
    + Lipid peroxides
    + Antioxidant capacity
    + Omega‑3, omega‑6, omega‑9, saturated, trans fats
    + Delta‑6 desaturase

    Jul 30, 2025 88 4 View on X
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    © 2025 Bryan Johnson