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You have probably been told to watch your sodium intake at some point. It is one of the most commonly repeated pieces of dietary advice in general health, and one of the most misapplied for people with migraines specifically.
Migraineurs do need more sodium than the average person.
Here is why. ↓
Sodium is not a villain. It is an essential electrolyte that the body depends on for some of its most basic functions: nerve signal transmission, fluid balance, muscle contraction, and maintaining blood pressure. Every time a nerve fires, sodium is involved. Every time your heart beats, sodium is involved.
As we cover in our dehydration blog, proper hydration is not just about drinking water, it requires a balance of water and electrolytes, with sodium being the primary one that keeps fluid where it needs to be. Drinking water without adequate sodium does not fully hydrate the body. It can actually dilute the sodium already in the blood, making things worse.
The idea that sodium is universally harmful became dietary orthodoxy in the 1970s, based on a report that relied on limited and selective data. As we explored in our Truth About Salt blog, more recent and comprehensive research has consistently failed to support the idea that reducing sodium improves health outcomes for most people.
A 16-year study from Boston University involving over 2,600 adults found that participants consuming less sodium actually had higher blood pressure than those consuming more, directly contradicting current dietary guidelines. Multiple large studies have shown that very low sodium intake is associated with increased cardiovascular risk, not reduced risk.
For the general population, the evidence against low sodium is growing. For migraineurs, the case is even more compelling.
The migraine brain is a channelopathy brain, meaning it has genetic variations in the ion channels that regulate electrical activity. These channels depend on a stable supply of extracellular sodium to maintain the electrical threshold above which a migraine attack cannot start.
Here is the compounding problem: research published in the British Medical Journal as far back as 1951 found that people with migraines excrete approximately 50% more sodium in their urine than those without migraines. This is not a dietary choice, it is a physiological characteristic.
That finding has been supported by more recent research. A 2016 population study using NHANES data found that higher dietary sodium intake was inversely correlated with severe headache and migraine history, the more sodium in the diet, the lower the migraine burden.
Put simply: the migraine brain needs more sodium than it is getting, loses more than average overnight and throughout the day, and is neurologically destabilized when levels drop.
This is one of the most important distinctions for migraineurs to understand. "Drink more water" is standard migraine advice and hydration does matter. But plain water without sodium does not replenish what the migraine brain is losing. It can actually lower plasma sodium further by diluting what is already in circulation.
The practice of adding a small amount of salt to every glass of water, not enough to taste strongly, just enough to maintain electrolyte balance is the daily maintenance habit that supports a stable neurological environment. It is not about eating salty food. It is about keeping the extracellular sodium available to the brain's ion channels consistently, not just at meals.
The most common pushback on higher sodium for migraineurs is blood pressure. But as our blood pressure blog covers, the sodium-blood pressure relationship is not straightforward, and migraineurs typically trend toward lower rather than higher blood pressure. For a heart-healthy person with a well-functioning arterial system, increasing sodium alongside adequate water simply increases blood volume and healthy arteries expand to accommodate it naturally.
If you have cardiovascular disease, kidney disease, or have been specifically advised by a doctor to restrict sodium, that guidance takes precedence. Always work with your healthcare provider before making significant dietary changes.
For most migraineurs, sodium is not the problem, it is part of the solution. The migraine brain loses it faster, needs it more, and functions better when it is consistently available. The goal is not to pour salt on everything, but to maintain a steady electrolyte baseline throughout the day, with water, with meals, and especially when factors like stress, barometric pressure, or exertion increase the rate of loss.
Our Electrolytes are formulated specifically for this: no sweeteners, no fillers, just the minerals your nervous system actually needs.
Sources
Campbell, Tonks & Hay — An Investigation of the Salt and Water Balance in Migraine. British Medical Journal, 1951.
Pogoda et al. — Severe Headache or Migraine History Is Inversely Correlated With Dietary Sodium Intake: NHANES 1999–2004. Headache, 2016.
Moore et al. — Low Sodium Intakes Are Not Associated With Lower Blood Pressure Levels Among Framingham Offspring Study Adults. The FASEB Journal, 2017.
Mente et al. — Associations of Urinary Sodium Excretion With Cardiovascular Events. The Lancet, 2016.
Health By Principle — The Body and Dehydration: Symptoms and Solutions.
Health By Principle — The Truth About Salt.
Health By Principle — Low Sodium Misleads.
