Skip to content
HeyJared

The Second Brain

Your gut controls your mood. AI is reshaping therapy. Longevity science is going mainstream. This is where mental health, technology and performance collide.

Newsletter · By David Tost · English · Paid tier available · Official site

Indexed issues, last 90 days
15
Latest publication
Sep 29, 2026
Audience
Checking…
Earliest in this view
Aug 22, 2026

Latest issues

  1. Issue · Sep 29, 2026

    Attention Deficit Is A Structural Problem (opens the original)

    Excerpt · Critical tone

    Read excerpt

    <img alt="" class="sizing-normal" height="1254" src="https://substackcdn.com/image/fetch/$s_!1OG1!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F2ff2699b-56eb-45e3-bfed-9371f5df41d4_1254x1254.p

  2. Issue · Sep 26, 2026

    Episode 10: Your Brain Wasn’t Designed For Infinite Focus (opens the original)

    Excerpt

  3. Issue · Sep 26, 2026

    The Stoic Case Against Optimizing Your Emotions (opens the original)

    Excerpt

    Read excerpt

    <img alt="" class="sizing-normal" height="971" src="https://substackcdn.com/image/fetch/$s_!iTga!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fbc72a913-b9fc-4af4-b6af-a0b9735e88ad_1536x1024.pn

  4. Issue · Sep 20, 2026

    Rest Is A Skill, Not A Reward (opens the original)

    Excerpt

    Read excerpt

    <img alt="" class="sizing-normal" height="1284" src="https://substackcdn.com/image/fetch/$s_!lNdf!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fe143f340-f9f9-45ed-89f8-132d82c7d2c2_2012x1774.p

  5. Issue · Sep 13, 2026

    The Delusion Tax (opens the original)

    Excerpt · Critical tone

    Read excerpt

    <img alt="" class="sizing-normal" height="971" src="https://substackcdn.com/image/fetch/$s_!VdtJ!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F1800b3b2-f1a8-4dbf-bf91-d4109bd2eb1e_1536x1024.pn

Publishing over time

Last 90 days. Choose a month to open its work.

Recurring subjects

Named in the text we hold. One piece can cover several.

Audience

No verified audience measurement yet.

About this data

Counts cover the work we have indexed. Tone needs enough text and a confident classification. Excerpts and episode notes are not full articles or transcripts.

Identity or attribution wrong? Suggest a correction.

See coverage about The Second Brain