The Comprehensive Guide to Curbing Food Cravings


Sugar’s true colors

When we’re hungry we crave food and that’s pretty normal. When we’re not hungry and we still crave food, we have a problem, and when we crave foods that our bodies aren’t designed to eat we have an even bigger problem. The types of foods we crave, the timing, and intensity of those cravings all depend on the types of foods we are used to eating.

What We Crave

It is perfectly normal to crave carbohydrates to some degree. After all, our brains need some glucose to function. A healthy adult needs around 150 grams of glucose to fuel the brain. (Although, we can get on just fine without actually eating that glucose as our livers are equipped to convert at least that much protein into glucose through a process called gluconeogenesis, if given enough protein to make the conversion.)

We also crave fat. The body’s two options for fuel are fat and carbohydrate. Fat is an efficient energy source as it provides a high level of satiety and is important for healthy hormone balance. Additionally, while carbohydrate weighs in at 4kcal/g, fat weighs in at 9kcal/g. Clearly fat will carry us further for less, a fact of which our ancestors were keenly aware. Anybody hunting and gathering every day would surely choose the easiest path to satiety. Hence, they would choose fat.

Our bodies are fantastic at utilizing fat as energy. This is such an efficient type of fuel that we’ve been eating it since we were born. Medium chain fatty acids are found in breast milk (there is also a high concentration of them in coconut oil which makes a great endurance food).

Not only is a high fat meal what we were born eating but fat is such a fulfilling and easy source of energy that we spend the rest of our lives seeking it and eating it in quantity. Each one of us eats ample fat right from the beginning of our lives. This requirement does not change as we get older. We have evolved to to eat a diet high in fat as JS at succinctly details in his article Why Humans Crave Fat. It’s just our evolution.

But our natural inclination towards fat cravings can get skewed in the Western world. That’s not to say that we stop craving fat. We don’t. But our carbohydrate cravings can be just as intense, if not more so.

Protein isn’t a food we generally crave apart from a small daily need. Apart from the 200 or so possible converted grams of glucose that your liver can convert in a given day, protein is not used for energy. Protein is used for cell repair and signaling, immune responses, and other processes, but not really for energy.

Six Causes of Food Cravings

1. Fat Restriction and Calorie Restriction
We are genetically pre-disposed to crave fat when we’re hungry. But most people these days have fallen prey to the Fat Hypothesis and restrict fat out of fear of high cholesterol and heart disease.

But, if you’ve already given up grains, sugar, and dairy, chances are you’re also limiting carbohydrates.

So you’re limiting fat and you’re limiting carbs – your only two available fuel sources? That is going to leave you pretty unsatisfied!

When you find yourself caving into cravings, it may just be your body’s way of saying, “I’m hungry”!

Junk food cravings might simply be calorie cravings in disguise.

2. Brain Chemistry: Endorphins, Serotonin, and Tryptophan
High glycemic foods such as breads and candy boost the brain’s production of endorphins and serotonin (temporarily, and then leave you drained). These neurotransmitters provide a sort of high that we get addicted to like drugs.

Endorphins are the body’s natural morphine and make us feel really good. High glycemic foods cause the release of endorphins.

Serotonin is another feel good chemical produced by the brain but many people have an impaired ability to produce it. The body can compensate for this lack by eating high glycemic foods to boost availability of tryptophan which can then be used to produce serotonin.

These neurotransmitter addictions are actually on par with cocaine addiction. You are addicted to a drug!

Additionally, our bodies react to a high glycemic meal by the release of insulin which causes the body to release excess ghrelin. Ghrelin is the hormone that makes us feel hungry. An excess of ghrelin results in fierce cravings for more food even after we’re already full.

A high carbohydrate diet is also responsible for leptin resistance due to the production of too much of it over time. Leptin is the hormone responsible for regulating our appetite. When leptin receptors are unresponsive, our desire for food remains active.

3. Imbalance of Intestinal Flora
If either yeasts or bacteria in our guts are out of balance, food cravings will ensue. Our guts contain literally trillions of microbes like bacteria and yeasts. Some of them are good and some of them are bad. When the bad ones start to gain turf and the good ones die off, all sorts of problems will start to surface, from headaches and fatigue, to irritability, to cravings and obesity.

Over the last decade or so researchers are beginning to understand that the human being has a symbiotic relationship with these microbes and that without them we become more susceptible to modern disease.

Jeffery Gordon, Director of Washington University’s Center for Genome Sciences, and his team have shown that normal weight people have more of a family of bacteria called bacteroidetes  in their stomach and intestines, while obese people have more firmicutes  bacteria.

His team was able to prove that there is actually connection to gut microbes contributing to obesity by “transplanting the gut microbiota from normal mice into germ-free recipients.” This increased “their body fat without any increase in food consumption.”

The reason for this might be that the bacteria are actually responsible for the amount of calories absorbed. The bad bacteria may somehow cause us to absorb more calories from our food. This means that two people could actually eat the same number of calories but the person with more of the bad bacteria will absorb more of those calories.

Additionally, gut bacteria has also been shown to be partly responsible for inflammation, which we already know contributes to obesity. According to Chris Kresser, “different species of bacteria seem to have different effects on appetite and metabolism.” Studies suggest that certain strains of bacteria are actually responsible for the systemic inflammation which leads to obesity.

Rebuilding gut flora is essential for human health but it isn’t always easy in our modern world where humans are driving many of these necessary microbes to extinction through our sterile and toxic diets and lifestyles. By reducing toxic exposure, eliminating refined sugar, eliminating sterile packaged foods, by including a variety of probiotics, by getting our hands dirty in out nature, and never using an anti-bacterial soap again, we can start to rebuild what we have lost and get healthy again.

It takes time to repair the amount of damage that us Americans manage to do to ourselves. Adding antimicrobial supplements like coconut oil and fermented foods and probiotics like apple cider vinegar we can help speed up the process.

4. Bad Moods
Calorie restriction has been proven to cause irritability, hostility, and depression (unless your’re efficiently utilizing your fat stores, which you’re not doing if you’re still eating a diet high in carbohydrates). Elevated insulin leads to hypoglycemia which also causes irritability. Withdrawal from brain chemicals is akin to drug withdrawal and causes a host of mood disorders.

Mood disorders often lead to emotional eating. When we get depressed, we eat more in attempt to alleviate the pain. When we’re depressed it’s harder to fight urges because we just don’t care about the consequences. Elevating the mood is paramount in preventing the mindless eating of junk food.

Improving ones mood has other advantages. Positive moods improve ones willingness to make positive changes and the strength it takes to fight hunger and persevere through the challenge of transition.

5. Gluten and Food Allergies
Melissa Diane Smith goes into  the games certain food chemicals play on our minds in Going Against the Grain. Reaction to gluten is not just a problem for celiacs but quite possibly for most people these days.

Eating wheat (or any other foods which causes the immune system to produce antibodies) causes tissue damage and can cause or exacerbate myriad health complications including, but not limited to, migraine, joint pain, depression, fatigue, hypoglycemia (which leads to overeating), and even schizophrenia. Gluten itself can cause a release of insulin and a suppression of leptin which will also contribute to cravings.

6. Excess Fiber
It’s common to start eating tons of vegetables after switching to the paleo diet. We’re indoctrinated with the idea early on that vegetables are good and meat is bad.

Fiber related disorders are a topic about which most of us are unaware. It’s a pretty simple (albeit boring) fix to an almost debilitating (in some situations) compulsion to eat. The most comprehensive research I’ve seen on the subject can be found on the The Fiber Menace website. This is some pretty amazing material worth checking out.

7. Fructose Malabsorption

Fructose is a sugar found in fruits and some vegetables. When someone does not digest fructose, it passes through the digestive system undigested, causing cravings, mood problems, bloating and other symptoms. FM is a common cause of severe food cravings. Read more about it here.

Author: Peggy the Primal Parent

The blog owner!


  1. great article on carb cravings. Makes more sense to me now why I don’t crave the sweets anymore after going primal and eating quality fats (grass fed beef is so tasty, and I love grossing out my daughter by eating coconut oil from the jar!)

  2. Just came across your site via a comment on Mark’s Daily Apple and I love what I see so far, starting a site myself, just wondering if I could bother you with a few questions. I’ll email you to avoid a lengthy comment discussion if you have the time. By the way, thanks for introducing me to high fat pemmican, already have some on the way thanks to your link and I’m buying The Happiest Baby book for my sister who’s expecting. You officially have another regular visitor to the site!

    • That’s great that you are going to try pemmican, that stuff is amazing! It’s the best snack or even midday meal of all in my opinion. But you know I like things simple :)

      Feel free to email me. My address is on my About Page. And thanks for your support!

  3. I love your site! I am mother of three little ones and we eat Paleo because of celiac disease, Multiple Sclerosis, and other food intolerances. I look forward to reading through your site. Yay!

    • Hi Lauren. Have you brought your little ones on board? Great work! You know, it can be hard at first but as their disposition changes, it really gets easier.

      I have celiac disease too. That’s what started me on my road to health over 6 years ago. If it weren’t for that I’d be stuck in the same mediocre rut that most Americans are in these days. Thank god for celiac disease!

  4. Wow, Peggy, what an awesome, comprehensive post. I’m so glad you found me, because now I have to stick around and check out your site a little more.
    My kids are 10 and 8 and it’s been a challenge to get them on board with the Paleo lifestyle. They have minds of their own, and they are not in love with the changes I’ve made over the past five months.

    • Thank you! I do hope you keep reading!

      Who would want to give up junk food right? Especially when they’re not yet miserable adults? Keep it up for yourself, stay strong and positive, and feed them a variety of healthy foods till they start to find favorites.

  5. My son is the one dipping into the coconut oil jar. He’d eat the whole thing in one sitting if I let him.
    I’ve never had pemmican bars before. Are they gamey tasting? Do kids usually like them right off the bat? Or do they take some getting used to?
    PS…great article and great website!!

  6. Hmm, not sure if they’re gamey tasting. I suspect I’m pretty used to the gamey flavor by now…

    Your son is already eating fat so the creaminess won’t be an obstacle. The flavor is pretty mellow. Pemmican is pretty plain actually.

    I usually put a dab of honey on top which my daughter spreads around with her finger. She has always liked that, but whereas she started out only eating a few bites at a time, she now will gobble down nearly a whole bar for dinner! So, yeah, I’d say it took a bit for her to really warm up to it.

  7. So, just for some inspiration, what does a daily menu for your daughter look like?

  8. This is fantastic! I will be stopping by more often. I would love it if you included more links to the science behind your conclusions, however. Also, all this information can be applied to an adult switching from the SAD to a healthy full-fat diet, not just to children! Kudos :)

  9. Hi Megan. There are some references at the bottom of the article but not so much trickled throughout. I read so much while writing this one that the links kind of got away from me. Anyway, I’d be happy to update with a few more.

    You’re definitely right about applying this info to adults too! That is exactly my intent.

  10. SUCH a great article! Thank you so much for sharing this. I will be putting a link up on Facebook. SO many people are misinformed and swayed by the jacked up USDA food pyramid and plethora of fad diets. :)

  11. Hello Peggy!

    Ive been a reader on Marksdailyapple for some time now, and Ive seen somewhere that you said you have to eat zero carbs, for some reason Ive forgtotten.

    Im a little curious about your daily meals. I eat very low carb myself, I dont work well with eating fruit daily, althrough I love vegetables and eat them at almost every meal.

    Btw even if Im not a parent, nor female, your blog often has lots of intresting things to read! Keep it up!!

    Take care /Erik

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  16. I love this site! I am young (26) and 8 months ago, due to dental problems started adopting a grain-free, sugar-free diet that eventually evolved to primal. The nice added side effect was that my depression symptoms suddenly stopped.

    I am convinced that my depression is gut related. The reason being is that whenever I eat even a small amount of bread, sugar or conventional food, my cravings for the entire day are completely out of control and I will not only feel depressed but overeat. Dr. Natasha Campbell-McBride writes about how even if we succeed in killing 99% of the bad gut bacteria, small amount of the foods they thrive on (starches, sugars, yeast ect) can cause an explosion in their population. When I am a “good girl”, my mood is very even and it is difficult to get me overly emotional.

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  19. Hi Peggy this article was amazing!

    I’m really curious about the part about fiber. Recently when I suddenly started eating a lot more vegetables compared to before I could not satiate my hunger and was craving carbs (sweet potatoes and fruit). When I ate mostly animal products and just some starches on the side (as opposed to fibrous vegetables), I ate a lot less. I was concerned that I wasn’t eating enough and not getting enough nutrients, so I upped the amount of veggies. But with the veggies it feels like I cannot stop eating! and end up overeating and feeling super stuffed :'( I’m reading through the fiber menance site (really helpful–thanks!), but haven’t found anything yet about cravings and fiber. Maybe I missed it–could you explain the connection?

    Thanks so much for your research. Love your blog and sharing it with a ton of friends :)

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