ALS, Light, Mitochondria, and the Architecture of Resilience

Feb 20
5 min read

Amyotrophic lateral sclerosis is not an abstract diagnosis in my life.

My grandmother developed ALS when I was 13.

She died the day after my 21st birthday.

That timeline matters. Thirteen is old enough to understand decline but young enough to feel powerless watching it. Twenty-one is supposed to feel like a beginning. Instead, it felt like an ending.

If you want to understand why I obsess over mitochondria, circadian signaling, neuronal membranes, zinc, DHA, fasting, structural nutrition, light biology, and metabolic architecture — this is part of the reason.

When my grandmother was declining, I was also glued to Stephen Hawking. I watched him because he had ALS and yet he lasted decades. I wanted to understand why he survived so long when others did not. I did not yet fully understand mitochondria, but I understood stem cells and nutrition. I did not yet understand bioenergetics. But I understood that something was determining resilience. That question pulled me toward physics before it pulled me fully into medicine. I became fascinated with black holes not because they are dramatic, but because they represent systems operating at energetic extremes governed by geometry, constraint, and conservation. Collapse is not random and stability follows structure or patterns.

Motor neurons are biological systems operating near energetic thresholds.

ALS is defined as progressive motor neuron loss, but motor neurons are among the most energy-intensive cells in the human body. They extend axons that can reach a meter in length. They maintain ion gradients continuously. (Water, salt, electrolytes). They transport mitochondria along microtubules. They require uninterrupted ATP generation to preserve electrical polarization.

When they fail, it looks like inflammation and degeneration.

But when you look upstream, what you see is instability in the most fundamental biological process we have: redox or the reduction of the oxygen you breathe in your lungs to carbon dioxide and free radicals in the mitochondria.

Energy over inflammation is the basic equation.

Inflammation is visible in ALS — activated microglia, cytokine elevation, reactive gliosis — but those are downstream responses to mitochondrial debris and structural instability. The initiating vulnerability lies in mitochondrial performance and regulation of the reduction of the oxygen you breathe in your lungs to carbon dioxide and free radicals in the mitochondria (redox). Motor neurons cannot tolerate inefficiency in this system because their energetic demand is constant and extreme.

One of the antioxidant genes I evaluate in my nutrigenetic panel is SOD2 (rs4880), the mitochondrial superoxide dismutase. SOD2 resides inside the mitochondria and converts superoxide radicals generated during oxidative phosphorylation into hydrogen peroxide. If SOD2 efficiency is altered, buffering of free radicals within the mitochondria weakens, and instability in the reduction of the oxygen you breathe in your lungs to carbon dioxide and free radicals in the mitochondria increases (redox). In a high-demand cell like a motor neuron, that narrowing of margin matters over decades.

But buffering capacity is not determined by SOD2 alone. I also evaluate glutathione pathway genes including GCLC, GSTP1, GSTM3, CTH, and AHCY. GCLC regulates the rate-limiting step of glutathione synthesis. GST enzymes conjugate glutathione to reactive intermediates. CTH influences cysteine availability, which feeds glutathione production. AHCY intersects methylation balance, which modulates oxidative defense and detoxification pathways. If glutathione synthesis capacity is reduced, hydrogen peroxide accumulates, lipid membranes oxidize more readily, and mitochondrial proteins sustain structural damage during the reduction of the oxygen you breathe in your lungs to carbon dioxide and free radicals in the mitochondria.

I also assess inflammatory cytokine polymorphisms including IL6 (rs1800795) and TNF-α (rs1800629). These genes influence baseline inflammatory tone. If someone is genetically predisposed to produce higher levels of pro-inflammatory cytokines, mitochondrial stress signals amplify more aggressively. Chronic inflammatory signaling feeds back into mitochondrial instability, further destabilizing the reduction of the oxygen you breathe in your lungs to carbon dioxide and free radicals in the mitochondria.

Energy over inflammation is the basic equation. Remember Redox means reduction of the oxygen you breathe to carbon dioxide and free radicals in the mitochondria.

Membrane architecture is equally critical, which is why my panel includes FADS1 (rs174547). FADS1 encodes delta-5 desaturase, a key enzyme in long-chain polyunsaturated fatty acid synthesis. Variants in rs174547 influence desaturase efficiency and alter the balance of long-chain fatty acids incorporated into cellular membranes. Neuronal and mitochondrial membranes are dynamic electrical structures. Their fatty acid composition affects membrane fluidity, curvature, electron transport chain stability, and proton gradient efficiency. If endogenous long-chain fatty acid synthesis is less efficient, reliance on direct dietary long-chain fatty acids — particularly DHA from seafood not plants — becomes more important. Without adequate structural incorporation, mitochondrial membrane performance shifts, influencing the long-term stability of the reduction of the oxygen you breathe in your lungs to carbon dioxide and free radicals in the mitochondria (again redox).

Zinc intersects antioxidant defense and structural integrity. Zinc supports SOD2 function but also binds to tubulin and influences microtubule assembly. Microtubules form the intracellular highways along which mitochondria travel in motor neurons. Axonal transport depends on intact microtubule geometry and ATP-dependent motor proteins. If zinc homeostasis is disrupted, microtubule stability declines, mitochondrial trafficking becomes inefficient, and regional ATP deficits develop along long axons. In neurons already operating near energetic limits, impaired transport compounds vulnerability.

The gut–brain axis adds another regulatory layer. I evaluate FUT2 (rs492602) because mucosal glycosylation patterns shape microbiome ecology and gut barrier integrity. FUT2 determines whether an individual secretes fucosylated glycans into the intestinal lumen, influencing microbial colonization and immune signaling. Altered microbiome composition changes production of metabolites such as butyrate, which functions as a mitochondrial substrate and epigenetic regulator. Shifts in gut signaling can increase systemic inflammatory tone, narrowing energetic resilience in cells dependent on stable mitochondrial performance.

Circadian signaling governs this entire architecture. Light entrains clock genes that regulate NAD⁺ cycling, mitochondrial biogenesis, antioxidant gene expression, and melatonin production. Melatonin acts within mitochondria as an antioxidant and regulator of permeability transition. Artificial light at night suppresses melatonin and disrupts circadian coherence. Over decades, disrupted light signaling destabilizes the reduction of the oxygen you breathe in your lungs to carbon dioxide and free radicals in the mitochondria in high-demand cells such as motor neurons.

When you watch someone you love lose muscle, voice, and breath, you do not see inflammation first.

You see energy leaving the system.

Watching my grandmother decline and watching Stephen Hawking endure forced me to ask a question that has never left me: what determines whether a system collapses or adapts?

Energy over inflammation is the basic equation.

ALS represents what happens when high-demand neurons lose long-term energetic stability. My work in nutrigenetics, structural nutrition, zinc biology, circadian signaling, light physiology, and mitochondrial function is an attempt to understand terrain at the level where collapse begins.

And that has been a driving force of my work for a very long time.