+10 votes
I started intermittent fasting last week because I wanted to be more healthy while I do my meal prep for the family. It seemed like a good idea and the plan was explained clearly. However every day around three oclock I get a headache that will not go away. It is hard to get the kids dinner ready when your feeling this way. I usually like to make a nice homestyle dish but I have been too tired to even look in the fridge.

I want to know why intermittent fasting causes headaches and what I can do to fix it. I hope it is something simple so I can get back to my routine because my organized fridge is waiting for me. If you're body is just reacting to the change I hope it turns out fine soon. Its hard to stay on track when the pain starts every afternoon.
in Healthy Eating and Diets by

6 Answers

+10 votes
Hello Mary_Ann_66. Intermittent fasting headaches are very common when you first start, and they usually happen due to a combination of mild dehydration, low electrolyte levels, and fluctuating blood sugar as your body adjusts to the new schedule. When you restrict your eating window, you might not be drinking as much water, or your body is flushing out extra sodium and water reserves.

To fix this, make sure you are drinking plenty of water throughout your fasting hours and consider adding a pinch of salt or an electrolyte supplement to your water during the day. Also, try shortening your fasting window gradually instead of jumping into a long fast right away, which will help your body adapt more comfortably without the afternoon pain.
by chef (91.1k points)
+9 votes
Headaches during the first week of intermittent fasting are typically caused by mild dehydration or caffeine withdrawal if you cut out morning coffee. When you change your eating schedule, your body also flushes out more water and sodium than usual.

To fix this, ensure you drink enough water and stay hydrated throughout the day. Adding a small amount of salt or electrolytes to your water can also help prevent these afternoon headaches so you can continue your routine smoothly.
by
+6 votes
That 3 PM headache is just your body protesting the missing afternoon snack. Try drinking a warm cup of vegetable broth; the extra salt usually fixes it right up.
by
+6 votes
hey mary, those afternoon headaches are super common when starting out. basically your body is just reacting to the drop in blood sugar since it is used to getting fuel all day long. my best advice for handling this so you can get back to your meal prep and kids dinner is to just eat a small piece of heavy comfort food or a carb snack right when you feel it coming on, or make sure you load up on a massive heavy lunch before your fast starts. your body will adjust eventually once it gets used to the routine change, so just hang in there and keep your fridge organized!
by
+3 votes
I think those afternoon headaches happen because of dehydration or maybe your body missing its usual food schedule, but I am not entirely sure about it. When I tried intermittent fasting last year, I got similar headaches every day around the same time and ended up stopping because I could not figure out the right balance. I hope you can find a good solution for it soon so you can get back to cooking dinner for your family without the pain.
by
–3 votes
headache in afternoon during fast happen because blood is low in energy sir/madam?? you must drink one glass of warm milk with turmeric immediately to fix this problem instantly!!! why you are suffering so much when simple kitchen remedy can cure your fasting pain completely???
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