The ADHD Rewire — Perform at Your Level Again in This Next Chapter
The ADHD Rewire

Four decades of outperforming without a diagnosis.

One hormonal shift that changed the conditions. A framework to perform at your level again.

You were never someone who struggled. You were someone who figured it out, held it together, and made it look manageable, for decades. Then perimenopause shifted the neurochemical architecture underneath everything, and the strategies that had always worked stopped working. This guide explains the biology behind that shift and gives you a sequenced framework for rebuilding your edge in this next chapter.

Sleep
Gut Health
Dopamine
Movement
Executive Function

The ADHD Domino Theory™ — five pillars, one cascade, one first domino to fix.

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Sound familiar?

You know exactly who you were.
You can feel the gap.

This is what high-performing women with late-diagnosed ADHD say at 11pm when nobody is listening.

"I used to be the person in the room who got things done. I ran on four hours of sleep, managed three projects, remembered everything, and still showed up. Now I walk into a room and forget why I'm there."

"I've read every productivity book. I've tried every system. Nothing sticks the way it used to. And I can't explain it to anyone because from the outside I still look fine."

"I don't need someone to tell me to try harder. I need someone to tell me what actually changed, and what to do about it."

Women with ADHD reported significantly greater worsening of symptoms during perimenopause compared to neurotypical women experiencing the same hormonal changes. The symptoms most commonly reported: worsening working memory, increased emotional dysregulation, and difficulty with task initiation.

Szymanski et al., 2023 · Journal of Psychiatric Research

What changed was the estrogen that had been modulating your dopamine system for four decades. When perimenopause began shifting that, the neurochemical architecture underneath your performance shifted with it. The strategies that worked were always working partly because of biology you didn't know you had. Now you need a framework built for the biology you have now.

What performing at your level looks like now

The next chapter has a
different operating system.

Here is what women who have worked through this framework describe on the other side.

  • Waking up and knowing what to do first, without the thirty-minute negotiation between intention and action
  • Getting through a full day without the 3pm crash that used to write off the second half
  • Understanding why certain days work and certain days don't, and having a lever to pull when they don't
  • Applying the same analytical capability you have always had to understanding your own neurology, and actually getting traction
  • Performing at your level in a way that is sustainable in this chapter, not a recreation of a system that depended on hormones you no longer have in the same supply

The ADHD Domino Theory™

Your symptoms aren't random.
They cascade.

Most ADHD approaches treat symptoms one at a time. Sleep advice. Productivity systems. Stress management. Each one helps a little and then plateaus, because the symptoms don't operate in isolation. They run through five interconnected pillars. Disrupt one and the others follow. Stabilise one deliberately and the others start to shift.

Aerobic exercise triggers the release of dopamine, norepinephrine, and serotonin in the brain at levels comparable to the effect of low-dose stimulant medication. A single bout produces measurable improvements in working memory and cognitive flexibility in adults with ADHD lasting two to four hours post-exercise.

Ratey & Hagerman, 2008 · Spark: The Revolutionary New Science of Exercise and the Brain
01

The neuroscience of late-diagnosed ADHD in women

Why estrogen was your invisible neurochemical support, what happens when it declines, and why high-achieving women with ADHD are the most underdiagnosed population in clinical practice.

02

The ADHD Domino Theory™ and your first domino

The five-pillar cascade explained. The built-in diagnostic to identify which pillar is creating the most downstream disruption in your system right now.

03

Sleep — why the ADHD brain fights it and what to do

Melatonin delay, cortisol dysregulation, glymphatic clearance. Three protocol options for the wired-but-tired nervous system.

04

Gut health — the upstream driver of dopamine

The estrobolome, serotonin production, and how your microbiome directly affects dopamine availability. Three protocol options, no dietary overhaul required.

05

Dopamine regulation — the central mechanism

What dopamine actually does in the ADHD brain, why the boom-bust cycle happens neurochemically, and how to design your environment around it.

06

Movement — the most accessible neurochemical lever

Type, timing, and duration that actually raises dopamine and norepinephrine. Why twenty minutes is enough and why when matters more than how much.

07

Executive function — a depleting resource, not a character trait

Task paralysis, time blindness, decision fatigue. What they are at the neurological level and three protocol options for working with them.

08

Your Minimum Effective Protocol

One domino, one move, three weeks. The fillable framework that turns the science into a protocol that fits your actual life.

From the community

Women who finally have
the right framework.

"I've known something was off since my mid-40s. Every doctor told me I was anxious. This is the first thing I've read that explained what was actually happening in my brain."
Sarah R., 48 — diagnosed 2023
"The gut-brain section alone changed something within two weeks. I changed one thing and my focus came back in a way it hasn't in years."
Michelle K., 52
"I've been a high performer my whole life. This was the first framework that treated me like one and gave me something I could actually build on."
Jules L., 46

About the author

C

P.Eng.  ·  M.A.Sc.  ·  PMP  ·  Mental Wellness Coach

Carla MacQuarrie

Engineer. Project manager. Late-diagnosed ADHD. Carla spent four decades as the person who figured things out, built the systems, and held the structure together. The diagnosis came after perimenopause made the compensation strategies visible by making them fail. The research she did afterward is what this guide is built on. She writes from the inside, not from theory. 58,000+ followers across Instagram.

One-time purchase
$27

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The ADHD Rewire — full PDF guide (8 sections)
The ADHD Domino Theory™ framework and diagnostic
Minimum Effective Protocol worksheet
Gut-brain quick-reference card
Sleep architecture checklist
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Questions

Is this a physical book?

No. It's a PDF designed to be read on any device, printed, or annotated. You receive it immediately after purchase.

Do I need a formal ADHD diagnosis to benefit from this?

No. The neurological and hormonal mechanisms in the guide apply whether or not you have a formal label. Many women reading this are mid-assessment or recognising themselves in the research for the first time.

Is this medical advice?

No. It's evidence-informed education designed to complement your relationship with your healthcare provider. Every claim in the guide is backed by peer-reviewed research and cited throughout.

I'm already on ADHD medication. Is this still relevant?

Yes. The lifestyle factors in the five pillars directly affect how efficiently your medication works, particularly as estrogen fluctuates in perimenopause. The guide is designed to work alongside medication.

I'm not sure I'm in perimenopause yet. Does this apply to me?

If you are in your late 30s or older and have noticed a shift in how your ADHD presents or how your coping strategies are working, the answer is likely yes. Perimenopause begins earlier than most people expect and hormonal fluctuation starts years before periods change.

© 2026 Carla MacQuarrie  ·  ADHD by Design  ·  Not medical advice.