Since I last wrote, I have had a couple people ask me about a carb hangover and ask if it is a real thing. I've also had folks ask if the discomfort is worth it. Lastly, I have had people inquire if it's similar or the same to a hangover from alcohol. Well, with those questions in mind I decided to 1. Explain what it feels like to have a carb hangover and 2. Provide a little research based info for my folks who are curious.
In my own experience, yes, a carb hangover is a REAL thing. Right after a binge on carbohydrates after being in ketosis for an extended period of time, I personally experience the following:
1. Huge carb crash and fatigue within hours.
2. 24 hour migraine
3. Abdominal discomfort
4. Diarrhea
5. Nausea
6. Water weight and glycogen gain (usually 3-8 lbs.)
Honestly, the whole situation is pretty awful, so I don't recommend going off the rails, to anyone. It's not really worth it at all. Further, if you are low carb/low sugar for a long time, you become much more sensitive to the taste of sweets and sugar, so many things you think you might want, don't taste the same at all and may even become aversions. For me, 100% grape juice is out - it blows my taste buds out!
Now for the science!
I found this excerpt in an article by Dr. Wayne Osborne (Head Doctor at Treated.com) on the effects of sugar binges on the body. The full article was published online and can be found at: Independent.co.uk Below you will find a basic timeline of what happens to the body after a sugar or carbohydrate binge, found in that article.
"Here’s a timeline of what happens during the hour following a particularly heavy sugar session.
0 - 15 minutes
15 - 30 minutes
30 - 45 minutes
Beyond 45 minutes
This is all dependent on how much sugar you eat, and your metabolism. But in some instances, the immune system can be inhibited for up to five hours after a binge."
In other words, STAY ON YOUR NUTRITION PLAN and do you best to reduce your sugar intake! It has an incredible effect on your health!!
1. Huge carb crash and fatigue within hours.
2. 24 hour migraine
3. Abdominal discomfort
4. Diarrhea
5. Nausea
6. Water weight and glycogen gain (usually 3-8 lbs.)
Honestly, the whole situation is pretty awful, so I don't recommend going off the rails, to anyone. It's not really worth it at all. Further, if you are low carb/low sugar for a long time, you become much more sensitive to the taste of sweets and sugar, so many things you think you might want, don't taste the same at all and may even become aversions. For me, 100% grape juice is out - it blows my taste buds out!
![]() |
| These doughnuts look unassuming, but watch out - too many can do more harm than you realize! |
Now for the science!
I found this excerpt in an article by Dr. Wayne Osborne (Head Doctor at Treated.com) on the effects of sugar binges on the body. The full article was published online and can be found at: Independent.co.uk Below you will find a basic timeline of what happens to the body after a sugar or carbohydrate binge, found in that article.
"Here’s a timeline of what happens during the hour following a particularly heavy sugar session.
0 - 15 minutes
- Sugar and bacteria in the mouth mix together to form an acid, which punishes tooth enamel.
15 - 30 minutes
- The sugars pass through the stomach and reach the small intestine. Here, they are broken down and absorbed into the bloodstream.
- The pancreas then releases insulin to try and cope with influx of sugars, and convert what it can into energy.
- This is then sent to muscle cells throughout the body; but the sheer amount of sugar in the blood will mean that some of it will have to be sent to the liver and stored as fat.
- While this is going on, the body interprets this significant rise in sugar and energy as the result of stress, and releases cortisol and epinephrine.
- These hormones cause the heart rate to increase, which will in turn cause blood pressure to rise, and may induce sweating.
30 - 45 minutes
- The sugar high caused by the release of dopamine in the brain is likely either in full flow, or has passed and is now beginning to waver.
- What comes next is an almighty sugar crash, caused by insulin and stress hormones working overtime and leading to a dramatic drop in blood sugar.
- Lethargy, sluggishness and maybe even irritability may follow, and this drop in blood sugar may even cause a headache.
- In response, your stress hormones try to stabilize your blood sugar levels and extract what they can from your liver.
- Somewhere in this process, sugar expanding in the stomach and gut and evacuating has also probably caused feelings of pain, discomfort and flatulence.
Beyond 45 minutes
- Rising and falling hormone levels have an inevitable detrimental effect on the immune system, which is temporarily rendered less able to deal with harmful infections.
This is all dependent on how much sugar you eat, and your metabolism. But in some instances, the immune system can be inhibited for up to five hours after a binge."
In other words, STAY ON YOUR NUTRITION PLAN and do you best to reduce your sugar intake! It has an incredible effect on your health!!





