Migraine: A Brain Running Low on Energy

TL;DR: Migraine is more than a bad headache. A growing body of research points to a brain that runs with a thin energy margin. In people prone to migraine, the brain has less reserve to draw on, so when demand climbs or fuel drops (a skipped meal, a short night, dehydration, a weather swing) a vulnerable region loses its footing and an attack begins. This is why so many triggers turn out to be metabolic stressors, and why three low-cost supplements with trial evidence (magnesium, riboflavin, and CoQ10) lower attack frequency by feeding the brain's power supply. The metabolic story is a large part of the picture, and there is more to it: the CGRP pathway carries much of the pain once an attack fires, which is why the newer CGRP-blocking medicines work so well. The most durable plan raises your threshold by building metabolic resilience, and keeps the right medication ready for the attacks that still break through.

If you live with migraine, you already know it is a whole-body event and more than a stubborn headache. There is often a warning phase hours ahead, when you feel foggy, irritable, or oddly tired and cannot say why. Then the pain, the light that feels like knives, the nausea, the need for a dark and quiet room. And then a hangover the next day that leaves you wrung out. You have probably been handed a rescue medication and told to avoid your triggers, and you have probably wondered why your brain is this touchy in the first place.

What I want you to know is that the question is a good one, and the science has a compelling answer taking shape around it. A large and growing thread of research treats migraine as a disorder of brain energy: a brain that, in the people who get migraines, runs closer to the edge of its energy supply than it should. That single reframe changes how the whole condition makes sense, from why your triggers look the way they do to what you can do to have fewer attacks.

What is happening in the brain during a migraine?

For a long time migraine was blamed on blood vessels, the idea being that vessels in the head tightened and then swelled and that swelling was the pain. That picture turned out to be too small. Migraine is a neurological event that involves the brain itself, its nerve cells, its chemistry, and its energy handling, with the blood vessel changes coming along as part of the cascade rather than the cause.

A migraine tends to move through phases. The prodrome comes first, hours to a day ahead, with fatigue, mood shifts, food cravings, or a stiff neck. Some people then get an aura, the flickering lights or blind spots or tingling that march across the vision or the body over a few minutes. Underneath the aura is a slow wave that neurologists call cortical spreading depression: a front of intense nerve firing followed by a hush of electrical silence that travels across the surface of the brain. That wave is expensive. To fire and then reset, brain cells have to run ion pumps hard to move sodium, potassium, and calcium back where they belong, and running those pumps burns a great deal of energy.

Then comes the headache phase, when a nerve network called the trigeminovascular system switches on, releases inflammatory signaling molecules, and drives the throbbing pain and the sensitivity to light, sound, and movement. The postdrome, the migraine hangover, is the brain slowly finding its feet again.

Hold on to one idea from all of this: a migraine is a high-energy storm. Every part of it, the spreading wave, the pump activity, the recovery, asks a lot of the brain's power supply. Which raises the obvious question about the supply itself.

Could a migraine be a sign of a brain running low on energy?

This is the lens I find most useful, and the one I think gets missed. The brain is an energy hog. It is about 2% of your body weight and burns roughly 20% of your energy, and it has almost no way to store fuel, so it depends on a steady, minute-to-minute delivery of glucose and oxygen that its mitochondria, the power plants inside every cell, turn into usable energy. A brain like that has very little margin for error.

The migraine brain appears to run with even less margin than most. Studies that measure brain chemistry in living people, using a technique called phosphorus magnetic resonance spectroscopy, find that people with migraine tend to have a lower energy reserve between attacks, seen as reduced phosphocreatine (think of it as the cell's backup battery) and higher lactate (a sign the cell is falling back on a less efficient way of making energy). In other words, the machinery is working harder to keep the lights on even on a good day.

So picture a brain that sits closer to its energy ceiling, with a region or two that is a little less resilient than the rest. On an ordinary day it copes. But when something raises the demand or lowers the supply, the reserve is not there to absorb it, the pumps that keep the peace between nerve cells start to struggle, and the whole system slips into an attack. Migraine, in this view, is what a metabolically fragile brain does when its energy books do not balance. Researchers have described it as a mismatch between the brain's energy reserve and its workload, and even as a protective reflex, an attack that forces rest and lowers demand while the brain restores its energy balance.

That is why I talk with patients about building resilience rather than only chasing pain. If the root vulnerability is a thin energy reserve, then the deepest work is widening that reserve so the same triggers no longer tip you over.

What does the evidence say about migraine and brain energy?

This is not a fringe idea, and it is worth seeing how many separate lines of evidence point the same way.

• Brain imaging. The spectroscopy studies above show a measurable energy deficit in the migraine brain, both during attacks and in the quiet stretches between them. The brain misbehaves during a migraine, and it runs lean the rest of the time too.
• Mitochondrial biology. When the cell's power plants underperform, they make less energy and more oxidative stress (a kind of cellular wear and tear), which lowers the threshold for an attack. This is why migraine shows up so often in people with inherited mitochondrial diseases, and why the migraine brain looks, biochemically, like a brain under energy strain.
• Blood sugar and insulin. People with migraine are more likely to carry insulin resistance and metabolic syndrome, the cluster of high blood sugar, blood pressure, and belly fat that makes the body handle fuel poorly. When the body cannot move glucose smoothly, the brain's fuel delivery gets choppy, and a brain that needs steady fuel does not do well with choppy.
• An alternate fuel helps. Ketones, the fuel your body makes from fat when carbohydrate is scarce, can supply a large share of the brain's energy and seem to bypass some of the glucose-handling problems in migraine. Early studies of ketogenic and low-glycemic eating patterns show fewer migraine days for some people, which fits the energy model neatly.
• Feeding the power supply works. The strongest practical proof comes from three supplements that support brain energy metabolism. In randomized trials, high-dose riboflavin (vitamin B2), coenzyme Q10, and magnesium each lowered migraine frequency, and riboflavin and CoQ10 work squarely by supporting mitochondrial energy production. When you can cut attacks by helping the brain make energy, that tells you something about the cause.

I will not repeat the dosing here, because we cover it in depth in our guide to drug-free migraine prevention. The point for this page is what the response to those supplements reveals: a brain that hurts less when you help it make energy is telling you where its trouble lives.

Why do the triggers so often line up with metabolic stress?

Once you see migraine as an energy problem, the classic trigger list stops looking random and starts looking like a single theme. Almost every reliable trigger is either a spike in the brain's demand or a dip in its supply.

• Skipping meals and fasting starve the brain of steady glucose. This is one of the most common triggers there is, and it is a fuel problem, plain and simple.
• A short or irregular night of sleep is when the brain does much of its metabolic housekeeping and clears waste, so poor sleep leaves it starting the day with a smaller reserve.
• Dehydration thins the delivery system that carries fuel and oxygen to brain cells.
• Alcohol disrupts both blood sugar and sleep, and taxes the same energy machinery.
• Intense stress, and the let-down right after it, floods the system with hormones that raise the brain's energy demand.
• Hormonal shifts, particularly the estrogen drop before a period, change how the brain handles energy and excitability, which is part of why menstrual migraine is so common.
• Bright or flickering light, strong smells, and weather swings all raise the sensory and regulatory workload the brain has to pay for.

None of these causes a migraine in a brain with a deep reserve. They cause migraines in a brain that was already close to its ceiling. This is the threshold model, and it is the most useful way I know to think about your own attacks: on any given day your triggers add up against your reserve, and when the total crosses your threshold, you get an attack. You cannot always control the triggers. You can widen the reserve, which raises the threshold, which means it takes more to tip you.

If migraine is metabolic, why do the newer drugs target CGRP?

Here is where honesty matters, because the energy story is a large part of the picture and it is not the whole of it. If a patient walked away thinking magnesium and better sleep were the entire answer, I would have done them a disservice.

The biggest advance in migraine treatment in a generation targets a molecule called CGRP (calcitonin gene-related peptide), a signaling protein that the trigeminovascular system releases during an attack to drive inflammation and pain. Medicines that block CGRP, the injectable antibodies and the oral gepants, prevent and abort attacks well for many people, and they are a meaningful step forward. CGRP is the messenger that carries much of the pain once an attack has fired.

Genetics add another layer. The rare inherited forms of migraine are traced to specific genes, and those genes code for ion channels and pumps, the very machinery that controls nerve cell excitability. One of them, ATP1A2, is the gene for the sodium-potassium pump, the exact energy-hungry pump the brain uses to reset after the spreading wave. That is a quiet point of harmony between the two stories: the genes that make some brains prone to migraine, and the energy supply that runs the pumps those genes build, are describing the same vulnerable machinery from two directions.

So the most accurate picture layers these together rather than picking a winner. A thin energy reserve sets the threshold and helps decide how easily an attack ignites. The CGRP pathway and the trigeminovascular system carry the attack once it starts. Hormones, genetics, and a nervous system that has learned to overreact all tune the dial. These are not rival theories competing for the truth; they are floors of the same building. The value of the energy lens is that it points at the layer you can most durably strengthen yourself, while the CGRP medicines give you a strong tool for the attacks that still get through.

How do you raise your migraine threshold?

The plan I build with patients runs on two tracks at once, and the metabolic lens shapes both.

The first track is raising the threshold by widening the brain's energy reserve. That means steady fuel above all: regular, protein-forward meals so blood sugar does not crash, and for many people a lower load of refined carbohydrate so the peaks and valleys flatten out. It means a consistent sleep and wake time, the same on weekends, because irregular sleep is one of the biggest levers there is. It means staying hydrated, and it means regular aerobic movement, because steady cardio builds mitochondrial capacity, the brain's and the body's ability to make energy, over a season. On top of that foundation sit the three energy-supporting supplements with trial evidence, magnesium, riboflavin, and CoQ10, which we walk through with doses in our drug-free prevention guide. And underneath all of it, when the pattern fits, we look for and treat the metabolic drivers, insulin resistance and blood sugar swings, that keep the reserve low in the first place.

The second track is treating attacks well when they come. Rescue medication taken early, in the first hour, works far better than medication taken late, and a brain that has been given a wider reserve tends to respond to that rescue more reliably. When attacks are frequent, preventive medication, including the CGRP-blocking options, earns its place alongside the foundation rather than instead of it. The two tracks help each other: fewer attacks mean less rescue medication, which lowers the risk of the medication-overuse headaches that can otherwise drag an episodic pattern into a chronic one.

Two things sit outside all of this and come first. Any new, severe, or changing headache, and a short list of red-flag features, need a safety check before we talk prevention at all, which is what our guide on when a headache is serious is for. And a headache diary, tracking attacks against sleep, meals, cycle, and weather, is worth starting today, because it turns the threshold model from an idea into your own personal map.

In my practice, the people who get the furthest with migraine are the ones who stop asking only "what stops the pain" and start asking "why is my brain this easy to tip." When we treat the attack and widen the reserve at the same time, the number of bad days tends to fall in a way that surprises people who had made peace with their pattern. Migraine is not a personal failing or a low pain tolerance. It is often a metabolically fragile brain doing the best it can, and that is something we can build up.

How Fishtown Medicine approaches migraine

At Fishtown Medicine, migraine gets treated as a question to answer rather than a prescription to refill. Because this is direct primary care, we have the time to hold your whole timeline in view, the attacks, the sleep, the meals, the cycle, the stress, and to look underneath them for the metabolic pattern that keeps your threshold low. That often means labs that a rushed visit skips: fasting insulin and hemoglobin A1c to see how you handle fuel, magnesium and vitamin D, and a thyroid panel, with hormone timing added when attacks track with your cycle. For patients where blood sugar is the hidden driver, a short trial with a continuous glucose monitor can show, in plain numbers, how your own crashes line up with your attacks.

From there we build the two-track plan: the metabolic foundation that raises your threshold, and the acute and preventive medication that handles what still breaks through. If you are in Philadelphia and tired of powering through a workday only to crash into a migraine that erases your evening, that pattern is worth taking seriously rather than medicating around. The fastest way to start is to tell Dr. Ash what your attacks look like, and we will find the reserve worth building.

Related at Fishtown Medicine

• Drug-Free Migraine Prevention - the supplement doses and lifestyle stack that widen the reserve
• When a Headache Is Serious - the red-flag safety check to run before anything else
• Headaches: A Systematic Approach - the broader workup for chronic and recurrent head pain
• Reactive Hypoglycemia - the blood sugar crashes that so often sit under attacks
• Continuous Glucose Monitoring - seeing your own glucose swings line up with your attacks
• Hydration and Electrolytes - keeping the delivery system for brain fuel steady

Scientific References

1. Gross EC, Lisicki M, Fischer D, Sándor PS, Schoenen J. The metabolic face of migraine - from pathophysiology to treatment. Nature Reviews Neurology. 2019;15(11):627-643.
2. Del Moro L, Rota E, Pirovano E, Rainero I. Migraine, Brain Glucose Metabolism and the "Neuroenergetic" Hypothesis: A Scoping Review. The Journal of Pain. 2022;23(8):1294-1317.
3. Schoenen J, Jacquy J, Lenaerts M. Effectiveness of high-dose riboflavin in migraine prophylaxis: a randomized controlled trial. Neurology. 1998;50(2):466-470.
4. Sándor PS, Di Clemente L, Coppola G, et al. Efficacy of coenzyme Q10 in migraine prophylaxis: a randomized controlled trial. Neurology. 2005;64(4):713-715.
5. Peikert A, Wilimzig C, Köhne-Volland R. Prophylaxis of migraine with oral magnesium: a multicenter, placebo-controlled, double-blind, randomized study. Cephalalgia. 1996;16(4):257-263.
6. Gross EC, Klement RJ, Schoenen J, et al. Potential Protective Mechanisms of Ketone Bodies in Migraine Prevention. Nutrients. 2019;11(4):811.
7. Edvinsson L, Haanes KA, Warfvinge K, Krause DN. CGRP as the target of new migraine therapies - successful translation from bench to clinic. Nature Reviews Neurology. 2018;14(6):338-350.