I started this blog many months ago as self-help for my migraines, and it has evolved into a blog about low-carb, with occasional migraine-related posts. If you want a little more detail about this evolution, check out my About the Migraineur page. If you want a lot more detail, read the archives.
I have never claimed that there was any connection between migraine and a low-carb diet, but the thought has been nagging at the back of my mind. So many other health problems clear up when I limit grain, other starches, and sugars – what if migraine were another? What if I could get off Inderal, which has slowed, but not stopped, my weight loss?
Now, this new study from France has me wondering if low-carb could actually be a preventive measure for migraine. Warning: extremely technical language. If you’re not inclined to technical terms, (hey, I’m a bit of a nerd myself), try the layperson’s explanation on Jimmy Moore’s blog, where I originally found this.
Or, if even that’s too much, allow me to oversimplify even further. A ketogenic diet is one that reduces carbohydrates and replaces them with fat, thereby leading the body to produce ketones and burn them for energy. It’s long been known that a ketogenic diet can help control epilepsy in children – see this excellent article on Epilepsy Action’s website. According to the new study, the ketogenic diet works by changing the balance of two neurotransmitters, GABA and glutamate, in the brain. On a ketogenic diet, GABA increases, and glutamate decreases. This is because burning glucose causes the body to make more glutamate, and burning fat causes the body to make less.
Call me gobsmacked.
GABA may not mean anything to the average migraineur, but anyone who has ever suffered from migraine should be very familiar with glutamate. Glutamates in all their forms (mushrooms, parmesan cheese, soy products, MSG and its kin) show up frequently on lists of common migraine food triggers. What I did not know what that glutamate acts as an excitatory neurotransmitter, which just means it causes neurotransmitters to fire. I also didn’t know that glutamate is actually produced by our bodies, and I didn’t know that it often occurs in inverse ration to GABA, which is a neurotransmitter that inhibits the firing of neurons.
This suggests (but does not prove) that you can spend all the time you want avoiding all those glutamate-rich foods, but as along as you are feeding your brain a steady supply of glucose, it’s just gonna keep cranking out glutamate on its own.
Also note that one commonly prescribed migraine preventive is Topamax – an anti-seizure drug. This also suggests (but does not prove) that treatments that are effective for epilepsy may also be effective for migraine.
Things it would be nice to know:
1. How much glutamate occurs in the brain on the 300 g of carb a day recommended by the USDA?
2. How much glutamate occurs in the brain on the 20 g to 50 g of carb a day recommended by many low-carb diet plans?
3. How do these numbers compare to the glutamate in a reasonable-sized serving of Parmesan cheese or mushrooms?
4. When is someone going to do a study of the effect of a ketogenic diet on migraine? (Geez, I wish I were a scientist right now …)
Still, I find this very exciting – it really would be nice to get off Inderal!