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Is Cheese Addictive?

One of the reasons I hear most often for not being able to go vegan, is cheese.  I get comments like, “man, I want to go vegan, but I just can’t seem to stop eating cheese” or “I love cheese too much to ever go vegan.”  Is this simply a lack of willpower or a petty taste preference?  Or is cheese actually physically addictive?  There’s been a lot of controversy over this matter and today I’m going to lead you through some of the research, theories, and viewpoints in the cheese addiction debate.

The main proponent today of the cheese addiction theory is Dr. Neal Barnard, the president of the Physicians Committee for Responsible Medicine, an organization I’ve mentioned in several of my videos and used in my research many times.

In his article ,Breaking the Food Seduction, titled after the book of his it was announcing, Dr. Barnard states that “in PCRM’s research studies, when we take people off meat, dairy products, and other unhealthy fare, we often find that the desire for cheese, in particular, lingers on much more strongly than for other foods.”  And asks the logical next question, “could cheese really be addictive?”

Dr. Barnard cites a 1981 study conducted at the welcome research laboratories in research Triangle Park, NC, in which they analyzed samples of cows milk and were amazed to find what looked like, and ended up actually being, morphine.  In case you’re unaware, morphine is a highly addictive opiate.

Before we get into how opiates ended up in cow’s milk, lets take a little trip back to biology class to learn how opiates work within our body.  Throughout our cells, we cave receptors that are shaped much like locks that can only receive certain keys, so to speak. and when these various keys are fitted into the receptor’s lock, the cell is affected in a specific manner.  In the case of opiates, the key that fits into an opiate receptor is called an opiate agonist. It’s a chemical that, when bound with the opiate receptor, causes euphoria, a decrease in pain sensitivity, or analgesia, and can cause physical addiction.

So, back to our milk mystery.  How is it that morphine found its way into milk?  Well, first the researchers assumed that it must have come from the cow’s diet by eating poppies, the plant source of hospital morphine.  However, they discovered that in fact cows produced it within their body, specifically the liver, where traces of morphine, along with codeine and other opiates, are apparently produced and can end up in their milk.

Upon further study, it was discovered that milk from any species, contains casein, a protein that breaks apart during digestion and releases a slew of opiates, referred to as casomorphins.  Casein is and present in milk, with skim milk containing more, and is highly concentrated in cheese.

This is present in human breast milk as well and it’s posited that the purpose of our milk-made-morphine is to calm infants and may also be largely responsible for the mother-infant bond.

(Here we all thought it was our mother’s love when apparently, we were just strung out on boob juice.)

Now it’s still up for debate exactly how much of these opiates make it from our guts to our brain. I’ve linked to several studies on this matter in the bottom of this post.

Barnard states that until the 1990s, researchers believed that dairy opiates were too large to pass through the intestinal wall except in infants.  But in a French study, Barnard referenced and a Polish study I found, there is evidence that these opiates make it to the brain even in adults.

Due to mounting concerns, the European Food Safety Authority even did a scientific literature review in 2009 to asses the potential health impact of casomorphins and similar biologically active peptides.  So far, the jury is still out as a lot of the research is conflicting.

The United States…has not looked into this.  In fact, the USDA in 2000 worked with fast-food chains to ensure dairy was prominent in menu items.  Barnard cites that federally-sanctioned programs launched Wendy’s cheddar lover’s bacon cheeseburger, which single-handedly pushed 2.5 million pounds of cheese during the promotional period, and Pizza Hut’s ultimate cheese pizza–with an entire pound of cheese per pizza--selling five million pounds during a six week promotion, and helped subway promote cheese and make it a required ingredient on sandwiches.

(I’m sorry…I’m just…so proud to be an American right now.)

So, this would all lead us to easily conclude that cheese is physically addictive, right?  I mean, it has opiates in it, for god’s sake.  But there are some arguments against the addictiveness of cheese that have some weight to them.

The strongest I found was on a blog called The Vegan Option, which is also a radio show.  In her post ,Is cheese really addictive?, writer Diana Fleishman, who has a PhD. in psychology, specializing in comparative and evolutionary psychology, she points out that in addition to releasing opiate agonists, dairy also releases antagonistic opiate peptides, which also bind to the opiate receptors and block the agonists from activating.  Thus, these antagonists would have the opposite effect as the agonists and lead cheese to not be addictive.

Citing a Polish study from 2008, which analyzed the agonist and antagonist percentages present in several cheese varieties, Flieshman concludes: “ If these agonistic casomorphins are really important for causing an addiction to cheese we would see a big difference in the popularity of cheeses depending on the ratio of agonistic to antagonistic casomorphins.”

Her second objection to Barnard’s theory is that studies on the effect of casomorphins in formula-fed infants (several listed below) have shown the effects of casomorphins on their relatively much smaller body mass, to be negligible.

And her final objection is that dairy has not been shown to produce analgesia, the decreased sensitivity to pain that is one of the main effects of opiates like morphine.

Of course, Dr. Barnard states that “cheese holds other drug-like compounds as well. it contains an amphetamine-like chemical called phenylethylamine, or pea, which is also found in chocolate and sausage.  And there are many hormones and other compounds in cheese and other dairy products whose functions are not yet understood.”

My personal takeaway from all of this is that the science is fascinating, and the debate is certainly interesting, but to me, it doesn’t matter.

What matters to me is that dairy is a product of extreme suffering and abuse.  What matters is that mother cows are raped and their children are taken from them and sent to the veal industry so we can steal the milk intended for their babies.  What matters is me is that dairy cows’ are destroyed by the demands of back-to-back pregnancies and constant milkings that their bodies give out and they are killed 20+ years before their natural life span.

Yes the health effects of dairy are horrendous, and the actions of the USDA cheese pushers deplorable, and the consumption of dairy may very well cause physical addiction–but the one thing it certainly causes, is suffering, abuse, and death. and to me, that is the reality of cheese and dairy.

The bright side of all of this, is that you don’t have to give up cheese in order to not participate in cruelty and to improve your own health.  Today there are a wide variety of vegan cheeses, ones that melt and everything.  I’ll admit, in the early days, vegan cheese was…kinda like cardboard. But these days you van find every cheese variety, and if you’re not into the pre-packaged kinds, you can make your own!  I have links to some recipes listed below.

I’d love to hear from you on this: What are your thoughts on the dairy addiction debate?  If you’re vegan, was giving up cheese a challenge?  If your not vegan, is cheese holding you back?  Let me know in the comments!

See ya next nugget!







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Research & Journal Articles

Breaking the Food Seduction by Dr. Neal Barnard

An Assessment of the Addiction Potential of the Opioid Associated with Milk by Larry D Reid and Christopher L Hubbell, in Journal of Dairy Science

Review of the potential health impact of β-casomorphins and related peptides EFSA Report

Pharmacological versus sensory factors in the satiation of chocolate craving by Michener W, Rozin P. in Physiology and Behavior

Symposium Overview—Food Addiction: Fact or Fiction? by Rebecca L Corwin and Patricia S Grigson in The Journal of Nutrition

Taste Responses and Preferences for Sweet High-Fat Foods:Evidence for Opioid Involvement by Adam Drewnowski, Dean D. Krahn, and Mark A. Dem in Physiology & Behavior

Big Food About to Lose Its Biggest Defense: Food Really Is Addictive by PCRM

Contents of agonistic and antagonistic opioid peptides in different cheese varieties by E. Sienkiewicz-Szłapka et al, in International Dairy Journal

Relation of β-casomorphin to apnea in sudden infant death syndrome by Zhongjei Sun et al in Peptides

Cow's-milk–induced Infant Apnoea With Increased Serum Content of Bovine β-Casomorphin-5 by Wasilewska, Jolanta et al in Journal of Pediatric Gastroenterology and Nutrition

β-Casomorphins-7 in infants on different type of feeding and different levels of psychomotor development by Natalya V. Cost et al in Peptides

beta-Casomorphin-immunoreactivity in the brain stem of the human infant by Pasi A et al in Research communications in chemical pathology and pharmacology

Transport of bovine milk-derived opioid peptides across a Caco-2 monolayer by E. Sienkiewicz-Szłapka et al in International Dairy Journal

A placebo-controlled study of the effect of sour milk on blood pressure in hypertensive subjects by Yoshiya Hata et al in The American Journal of Clinical Nutrition

Is cheese really addictive? [main opposing argument collection] by Diana Fleischman on The Vegan Option

Dr. Barnard’s Citations


Other Articles Concerning Cheese Addiction:

Addiction to Cheese is Real Thanks to Casomorphins
Cheese Addiction (and How To Overcome It)

Is Cheese Addictive?

How and Why to Break the Cheese Addiction in Three Easy Steps

Culinarily Curious: Addicted to cheese? Here's why

Why Cheese is Like “Dairy Crack”: Because It's Got Morphine In It

Hooked on Cheese: Why some people are physically addicted to dairy


Make-Your-Own Vegan Cheese Recipe Collections:

10 Cheese Recipes by One Green Planet

8 Cheese Recipes by Veg Kitchen

14 Cheese Recipes by Buzz Feed


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  1. Omar on February 12, 2015 at 3:14 pm

    I am vegan and I gave up cheese for ethical reasons but I did see a really big change in the way I felt. I can only speak for myself but I did see a big significant change in my sleeping quality. Before giving up cheese I use to have pretty severe insomnia and also anxiety attacks at night when I would be trying to sleep. After going vegan for only a week I slept like a baby, no anxiety or anything. At first I thought it was maybe just a coincidence but I’ve been vegan for a while now and I’m 100% positive it was the cheese. I never thought I would ever be able to get decent sleep and neither did I think going vegan would help it, plus like I said before I did it for ethical reasons so health wasn’t a motivator. Shout out to my homie Gary!! Keeping shit real.

    • Emily Moran Barwick (BiteSizeVegan) on February 12, 2015 at 3:40 pm

      thanks so much for sharing this Omar! and i think it can have a huge impact on health! and i’ll pass along the shout-out for sure ;)

  2. Nancy Poznak on February 12, 2015 at 7:59 pm

    Emily- you’re hilarious! Thank you for this informative, entertaining, thorough nugget. I’ve always found it strange that people who (claim to) understand veganism say they just cannot live without cheese. Appreciated your info on the horrors imposted on cows and calves in ALL dairy farming. It’s important to understand that regardless of the type of farm (organic, free-range, etc.) dairy involves enormous cruelty, stealing babies, exploitation, rape, and brutal slaughter.

    • Emily Moran Barwick (BiteSizeVegan) on February 12, 2015 at 8:57 pm

      thank you so much, Nancy! I really appreciate it and am so glad you enjoyed it. you are very welcome. and i agree- that’s a key issue to understand. :)

  3. Vegan Junction on February 13, 2015 at 10:49 pm

    I always love how much research you put into. Another great video!

  4. Kristina Capucilli on August 4, 2017 at 2:13 pm

    I am just as addicted to non-dairy cheese… sigh.

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