Your gut controls your mood. AI is reshaping therapy. Longevity science is going mainstream. This is where mental health, technology and performance collide.
| Platform |  | Pricing | Freemium | Publishes | Daily |
|---|---|---|---|---|---|
| Issues | 88 | Founded | a year ago | Last Issue | 6 days ago |
| Active | |||||
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secondbrainnotes.substack.comLatest Issues
Your Attention Span Is A Longevity Metric
Here’s what nobody’s telling you: a fragmented attention span isn’t just a productivity problem.
It’s a biomarker.
The same stress response that makes you check your phone every four minutes is the one flooding your body with cortisol e...
The System I Use When Everything Else Stops Working
A paid deep dive on rebuilding focus and mental health after burnout, not the version that fits on a slide.
This one’s for paid subscribers.
The $100M Offer For Your Own Attention
The Problem Nobody Puts In Their Content Calendar
Every creator who writes about focus, audience building, or personal brand eventually lands on the same uncomfortable fact: none of it works if you can’t hold your own attention long eno...
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The writers behind this newsletter.
I write about ambition, mental resilience, and the modern mind. Author, The Second Brain. Building Sona.
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