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There’s no formal definition, but functionally it means stimulants aren’t producing the focus, executive function, or emotional regulation you (or your child) need — or they are, but the cost is too high. Roughly 20-35% of patients with ADHD don’t fully respond to stimulant treatment [1] and many more respond only partially. The conventional next step is usually a different stimulant, a non-stimulant, or augmentation. Our next step is testing.
Stimulants increase dopamine and norepinephrine availability at the synapse. They work on the signal. But synaptic availability isn’t the only variable in attention — the brain has to make those neurotransmitters in the first place, and that process requires nutrients, cofactors, and intact metabolic machinery. If the raw materials aren’t there, or if inflammatory load is high, or if the gut isn’t producing the precursors, no amount of synaptic enhancement will fully solve the problem.
The mechanisms most consistently implicated in attention and executive function:
Iron is the rate-limiting cofactor for tyrosine hydroxylase — the enzyme that produces dopamine. Low ferritin (well above the anemia threshold) correlates with ADHD severity in multiple studies [2].
Zinc modulates dopamine receptor function and is consistently lower in pediatric and adult ADHD populations.
Children and adults with ADHD often show low DHA. Supplementation has small but real effect sizes on attention measures [3].
COMT, DBH, MAO-A, and DRD4 variants change how dopamine is synthesized, transported, and broken down — affecting both medication response and baseline function.
B6 (P5P) is required for dopamine synthesis. Folate and B12 status affect methylation, which affects gene expression of catecholamine pathways.
Both modulate NMDA receptor activity and overall nervous system excitability.
IgG-mediated reactions to common foods drive systemic inflammation that affects the brain. Elimination protocols show meaningful behavioral improvement in subsets of children and adults with ADHD [4].
Recent research links specific dysbiosis patterns to ADHD severity — short-chain fatty acid producers tend to be reduced; pro-inflammatory species elevated.
Reactive hypoglycemia destroys focus. Often invisible on standard glucose testing but apparent on fasting insulin and continuous glucose data.
Lead exposure (still a real factor, especially in older homes) and other heavy metals affect neurodevelopment and adult cognition.
Untreated sleep apnea or insomnia can present indistinguishably from ADHD.
Our seven-test bundle covers all the relevant systems — but for ADHD we pay special attention to ferritin and iron studies, zinc, B-vitamin status, omega-3 RBC, food sensitivity (KBMO FIT 176), heavy metal and environmental toxicant exposure (EnviroTOX), and the genetic variants on the 3×4 panel that affect dopamine metabolism. The GI Effects stool panel reveals microbiome patterns and inflammation markers.
If you’ve already done genetic testing or food sensitivity panels, send them. We integrate.
Phase one usually addresses the most actionable nutrient deficiencies and any clear gut or food triggers. Mineral repletion, omega-3 EPA/DHA at therapeutic doses, B-complex tailored to methylation status, and dietary modifications come first. Phase two layers in more targeted interventions where indicated — adaptogenic herbs, dopamine-supportive amino acids, sleep optimization. Stimulants often become more tolerable, more effective at lower doses, or in some cases unnecessary as the underlying terrain stabilizes — but those decisions are always made in coordination with your prescriber.
Full program structure: main services page
This works for adults and parents of children whose ADHD hasn't been fully addressed by medication, who are open to comprehensive testing, and who want to understand the biological terrain underneath the diagnosis. We work alongside ADHD prescribers, never against them.