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Understanding Neurodivergence Through the Science of Biochemistry.
“We must regulate before we educate.”
When Kimberly Kitzerow’s nonverbal autistic daughter could not speak, the field offered behavioral explanations for a physiological comorbidity. Helping her daughter become fully conversational led to the development of several original frameworks that explain neurodivergence, why comorbid traits cluster, and how neuroplasticity can be used to support improvements in skills and behavior.
“In 2020, after covid, my nonverbal autistic daughter had no access to in person services. I became her only chance, and what I learned changed everything I thought I knew about neurodivergence.”
Original frameworks built from the ground up
Each novel framework emerged from raw protein data-level synthesis via biochemical network construction utilizing data from Uniprot— not from summarizing existing literature, but from organizing raw biological findings into coherent, novel models.
Novelty of NeuroToggle
The first physiologically informed instructional framework that builds the neural circuitry that produces skills and behaviors rather than attempting to modify the behaviors or skills themselves.
Novelty of Kitzerow’s Autism & the Comorbidities Theory
The first causal theoretical model to organize all causes of autism around regulatory system domain activation linked to a joint biochemical cascade with each node explaining an autism trait, comorbid trait, or clustering mechanism.
Novelty of Neurodivergent Biochemistry
The first framework to organize how different types and durations of biochemically induced stress alter temporally regulated processes of development and function across the lifespan.
Novelty of BioToggle® and the BioDials
The first classification systems to categorize epigenetically regulated protein synthesis into categorical regulatory system domains and temporal cycle domains, mapping how each drives protein induction.
NeuroToggle®
Stop managing behavior and skills.
Start building the brain circuits that produce them.
“Neurodivergent brains aren’t just diverse. They operate under different biological states.”
Neurodivergent Biochemistry suggests that certain genetic variants can keep the nervous system in a chronic stress-adaptation state. This redirects resources away from typical learning and developmental processes, altering how neural networks form.
Because neural networks store the information for how to do behaviors and skills, these physiological conditions can influence neurodevelopment and behavior.
NeuroToggle® was created to address this by applying established teaching pedagogy to intentionally build and strengthen neural networks through physiologically informed instructional strategies utilizing well known teaching pedagogy.
Strengthen
Build reliable pathways through targeted practice so skills become consistent.
Time
Coordinate neural timing so skills execute smoothly in real life.
Build
Develop entirely new pathways for skills not yet in the learner's neural network.
Expand
Generalize skills across different settings, people, and situations.
The Science Behind it.
Understanding the Neurodivergent Body and Brain: The impact of genetically/epigenetically induced lifelong allostatic stress activation.
Three interconnected frameworks that form a unified systems-level model of neurodivergence from biochemical origins to educational interventions.
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Neurodivergent Biochemistry
What it is:
A framework that looks at how genetics, epigenetics, and stress affect how the body works. It focuses on how changes in biochemistry and protein activity can influence brain development and overall health. -
Kitzerow's Autism and the Comorbidities Theory
What it is:
A theory explaining why autism and certain health conditions often occur together. It suggests that genetic and epigenetic factors can keep the body in a long-term stress response, which can affect both brain development and physical health, simultaneously. -
NeuroToggle®
What it is:
NeuroToggle® is a teaching framework based on a simple idea: the information for how to perform skills and behaviors is stored in neural connections. NeuroToggle uses structured teaching strategies to develop and strengthen those connections.
Scope and Classification of Each of Kitzerow’s Frameworks
This work spans multiple frameworks. The following clarifies the scope and evidentiary classification of each.
Brief Overview of Scope and Classification:
NeuroToggle® is population wide because skill development occurs through neural connectivity encouraged by teaching pedagogy across all humans.
The application of NeuroToggle® to target the skill of speech development is n = 1 until broader studies are conducted.
Gene coded protein function is conserved across humans, making the classification of Kitzerow’s BioGene biochemical network population wide.
Autism biomarker data is demographic wide, and comparing it to Kitzerow’s BioGene biochemical network shows how the autism demographic differs from population wide biochemical activity.
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NeuroToggle® describes the science of skill and behavior development through neural connectivity. Learning occurs as neural circuits are built, strengthened, expanded, and timed through instruction. These mechanisms are grounded in human neurobiology and apply broadly across the population because all humans develop skills through neural connectivity and neuroplasticity.
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Using NeuroToggle® to target the specific skill of speech with my daughter when she was nonverbal represents an individual application of the framework. The framework itself is population wide, grounded in how all humans build skills through neural connectivity. My daughter went from nonverbal to fully conversational, but this outcome is anecdotal and classified as n = 1 until broader pilot testing or structured studies are conducted. What is generalizable is the framework. What remains anecdotal is this specific application.
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The biochemical network was built using gene coded protein data. Because these proteins and their pathway functions are highly conserved (99.9%) across humans, this dataset represents population level human biology rather than individual observations. Variability is in efficacy, not in which ones are produced. This biochemical network was organized by gene coded protein function, with efficacy impacting health.
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The autism theoretical model emerges by comparing autism biomarker data from the autism demographic with the population wide biochemical network. This comparison identifies where regulatory systems within the autism demographic diverge from population biology. Because the network was organized by protein function rather than gene variants, genomic variability does not affect the outcome. Variants influence efficacy within pathways, not which functions or pathways exist. The network remains a stable population wide reference point regardless of individual genomic differences.
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BioToggles describe the patterns of regulatory system mediated protein synthesis identified within the biochemical network. Because they are derived from gene coded protein data and conserved biological pathways, BioToggles represent population level biology rather than individual observations.
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BioDials describe the patterns of temporally regulated protein synthesis identified within the biochemical network. Because they are derived from gene coded protein data and conserved biological pathways, BioDials represent population level biology rather than individual observations.
Kimberly Kitzerow’s Story
Kimberly’s daughter was nonverbal. She is now fully conversational.
Nonverbality is an autism comorbidity. There is a mechanism behind it.
“The question of why my daughter couldn't speak sent me looking for the link between autism and its comorbidities and that search became Neurodivergent Biochemistry and all of the frameworks within it."
Kimberly Kitzerow’s Story
While trying to understand her daughter’s nonverbal autism, Kimberly Kitzerow created a biochemical network of human gene-coded proteins and compared autism biomarkers to it to identify points of dysregulation. This analysis revealed a biochemical cascade linking autism traits and comorbidities through shared biological nodes, along with patterns of regulatory system–mediated protein synthesis she calls BioToggles and temporally regulated protein synthesis she calls BioDials. Together with NeuroToggle, these frameworks form the foundation of Neurodivergent Biochemistry.
Kimberly Kitzerow’s Timeline
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On her daughter’s fourth birthday, Kimberly Kitzerow realized something important when her daughter could not blow out the candles on her cake. The moment revealed that her daughter’s nonverbality was not simply behavioral, but a physiological autism comorbidity affecting motor function required to phonetically produce speech sounds.
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In response, Kitzerow created and implemented a physiologically informed, neuroplasticity-based instructional framework designed to develop the motor neural circuits required to phonetically articulate speech sounds and the linguistic pathways required for comprehension.
Her daughter eventually became fully conversational, and the framework was formalized as NeuroToggle®. -
After their story was publicly released in 2022, Kimberly Kitzerow was frequently asked whether she had cured autism. Her response was that she had addressed a comorbidity, nonverbality, rather than autism itself. This led to what she later called the Exclusivity Principle, the observation that autism traits and their comorbid conditions appear together with remarkable consistency. The principle proposes that autism and its comorbidities are biochemically linked through shifts in biochemical pathways that produce a shared biochemical cascade.
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To test this hypothessi, Kitzerow constructed a biochemical network of human gene coded proteins and compared autism biomarkers from existing scientific literature to that network in order to identify points of dysregulation. By mapping these biomarkers to protein functions across multiple physiological systems, patterns of convergence began to emerge.
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The analysis revealed a biochemical cascade linking autism traits and comorbid conditions through shared biological nodes. Patterns also emerged within regulatory system mediated protein synthesis, which Kitzerow termed BioToggles, and within temporally regulated protein synthesis, which she termed BioDials. Together with NeuroToggle, these discoveries formed the foundation of the systems level framework known as Neurodivergent Biochemistry.
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In 2025, multiple research groups published studies examining mechanisms that align with elements of Kitzerow’s Autism and the Comorbidities theoretical model, including redox regulated BH4 linking autism and systemic comorbidities (Latini, Brazil), the biochemical cascade and cell danger response explaining why restoring metabolic signaling can improve neurodevelopmental outcomes (Naviaux, UC San Diego), excitatory and inhibitory imbalance within the cortico striatal thalamic loop associated with autism traits (Yale and Stanford), categorical gene mutation impacts on biochemical pathway activity that cluster autism traits and comorbid conditions (Princeton), and nitric oxide driven NOS uncoupling leading to an epigenetic redox sensitive mTOR protein shift that alters synaptic pruning in autistic brains (Israel and Harvard).
Resources To Learn More
Books
Memoirs documenting Kimberly Kitzerow’s journey helping her daughter transition from nonverbal autism to speech and books outlining the NeuroToggle instructional framework.
Utilization
Utilization of Kitzerow’s utism and the Comorbidities Theory in recent research including studies examining BH4 pathway dysfunction in autism and biochemical mechanisms linking autism traits with comorbidities.
Researchgate Papers
Research papers that document the development of Neurodivergent Biochemistry and supporting scientific literature connected to the BH4 pathway, BioToggles, BioDials, and the Autism and the Comorbidities theory.
Etsy Store
Infographics, and educational materials designed to help families and educators understand neurodivergent development and the biological concepts connected to autism and its comorbidities.
Folinic Acid Concerns
A scientific overview of how megadoses of folinic acid can overload cell turnover and how the study was terminated and put on a full clinical hold by the FDA, yet was still published.
Understanding Nonverbality Through Speech-Motor Pathways
Apraxia is not an illusive or abstract concept; there are specific mechanisms that connect the brain to the physical production of speech, running from the corticobulbar tract to the motor nerves responsible for shaping sound into words. When these pathways function differently, nonverbality appears in one of three forms: Complete Lack of Ability when the speech-motor system is underdeveloped or damaged; Intermittent Ability when speech is available only during regulated internal states; and Situational Ability when speech is present in safe, low-demand environments but shuts down under social or sensory stress.
Resources for Parents of Nonverbal Kids
Nonverbality is an autism comorbidity. This is the comorbidity that Kitzerow’s daughter had that sent her looking for the link between autism and the comorbidities, which sparked the creation of all of this!
Parents of Nonverbal Children Start HERE.
From Silence to Speech
Learn how I helped my nonverbal autistic daughter develop speech by identifying the physiological mechanisms behind communication and building structured neuroplasticity-based strategies.
Letters to State and Federal Representatives
Read my communications with policymakers addressing the need for reform in autism research, education, and diagnostic criteria, along with specific legislative recommendations.
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