The Weed Diet? Pot’s Baffling Effects on Weight

The Weed Diet? Pot’s Baffling Effects on Weight


It sounds like a stupid dieting infomercial – eat more and lose weight! – but studies continue to show that marijuana users, despite eating an additional 600 calories per day, are less likely to be obese or suffer from diabetes.

Skeptical? You should be. (I mean… come on, munchies and weight loss?)

Well, here’s the evidence.

Exhibit A: A 2011 study in the American Journal of Epidemiology compared obesity rates between marijuana users and non-users in two nationally representative surveys. In one, 22% of Americans who did not use marijuana were obese, compared to 14% of marijuana users. In the other, 25.3% of non-users were obese, compared to 15.2% of users. The association between marijuana usage and a lower body mass index remained even after controlling for age, sex, and tobacco use. Furthermore, an experiment in which rats were injected with cannabis showed that marijuana caused significant weight loss compared to the control group.

But wait, there’s more. A study of 11,000 Americans published in the British Medical Journal also found that, after controlling for age, sex, and socioeconomic status, marijuana users had significantly lower rates of diabetes.

What’s the secret behind this magic? Well, a 2013 study in the American Journal of Medicine attempted to answer that question. The researchers looked at about 5,000 American adults and measured the relationship between their use of cannabis, waist-circumference, insulin levels, blood sugar, and insulin resistance. They found that, after controlling for age, sex, race, education level, income, marital status, tobacco use, physical activity level, and alcohol use, regular cannabis smokers both had thinner waists and better metabolic indicators. They conclude by suggesting that the biochemical effects of THC and Cannabidiol, the two main psychoactive components in marijuana, may explain their findings.

Studies such as these gave rise to “the seemingly paradoxical hypothesis that THC or a THC/cannabidiol combination drug may produce weight loss and may be a useful therapeutic for the treatment of obesity and its complications.” 

For now, though, we can’t say that marijuana use causes weight loss in humans. (In fact, the only way to do that for sure would be to run an experiment where some people are randomly assigned to smoke weed, which, of course, would be illegal).

Maia Szalavitz, a columnist for Time magazine, identifies some alternative explanations:

1)      The religiosity hypothesis: people who frequently attend religious services are more likely to obese. They also are much less likely to smoke marijuana.

2)      The medical marijuana hypothesis: people who suffer from HIV or are undergoing chemotherapy are often prescribed cannabis in states which permit medical marijuana to bring back their appetite. Consequently, the observation that marijuana smokers are less likely to be obese may have causation backwards.

3)      The “pick-your-poison” hypothesis: Some people comfort eat when they’re sad. Some people smoke weed when they’re sad. Maybe people who smoke weed when they’re sad don’t comfort eat. (This one is definitely wrong since we know marijuana users eat more than normal).

4)      The rimonabant dilemma: Rimonabant, a drug that has the opposite effect of THC, the chemical known to make marijuana users hungry and high, has been shown to cause significant weight loss, though because it also frequently leads to depression and suicide, it’s no longer used for this purpose.

Another one that comes to mind is that people who use other illicit drugs, like cocaine or meth, often smoke weed as well (though not the other way around), and use of these drugs might explain the lower rates of obesity in the marijuana-using population. Studies so far haven’t looked at this, though they have controlled for tobacco and alcohol usage.

However, these hypotheses remain untested and some have obvious problems. Moreover, these hypotheses cannot explain why, according to the American Journal of Medicine study I described earlier, marijuana users have reduced levels of blood sugar and insulin and have higher levels of “good” cholesterol. (Intriguingly, the response was not “dose-dependent”; in other words, how much marijuana people smoked did not affect these outcomes.) What’s more, it’s not just that marijuana smokers are less likely to be obese; they are less likely to be obese despite eating more food.

In any case, none of this is to say that marijuana is good for you – there are also a variety of negative consequences associated with use. Side effects may include increased risks of stroke, heart attacks, blood vessel constriction, testicular cancer (but not lung cancer?), and the drug, at least in some people, carries some risk of dependence.

But compared to some weight loss methods, marijuana use could be relatively benign.

[image credit:]


About author

Michael Zoorob

Michael Zoorob is a senior from Brentwood, Tennessee, majoring in political science and economics. Zoorob’s interest in politics grew out of an interest in news and world events that began at a young age. Though intrigued by all forms of politics, Zoorob is particularly interested in international relations, drug policy, and the politics of stigmatization. Previously Online Director, he is currently the President of VPR and writes the column, "The Politics of Fear."

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  • Patrick#2

    August 1, 2018

    Hello there All, I simply need to inquire as to whether anybody at any point took a stab at utilizing medicinal cannabis as an option meds? I have perused many articles about restorative weed and how it can enable you regarding interminable to torment, bone wounds, dietary problem/anorexia, nervousness issue and fits of anxiety, irritation, considerably disease and significantly more. Like this article about a cannabis strain from: Cbd and thc are additionally new to me and I don’t smoke. In the event that this is genuine I cannot locate any strong decisive confirmation that addresses its adequacy. Any individual experience or tribute would be very valued. Much appreciated

  • Disadvantages of Weed#3

    January 10, 2018

    Wow! What a Great Article Thanks Man! Great work! Really great info.
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  • Morine Barnes#4

    June 10, 2017

    TISWAS Police 5 Shaw Taylor Credit Reference A friend in need is a friend indeed deed. Doctors are drug dealers and my prescribed medication is aripiprazole, citalopram, naprozen, furosemide, biscodyl, atorvastatin, Xenical, Reductil and adidifax. Drug dealers are only in it for the money and do not care about clients. Medication does not cure it only treats the symptoms. I Morine Barnes is 14st DEPRESSION. I got 5st FAT to lose to maintain 9st Dr RB Chitre cares I care. I diet as prescribed professionalism 800kcal vegetarian daily and exercise 3 times a week at the gym Ivy the Nurse plus 1 hour daily walk. I cannot help being sick. What else is there. Can you do it. I blame myself naive. Morine Barnes 58. Donald 59, Myola 37 & Rommel Edwards 35. Graham 90.

  • Angel#5

    June 4, 2016

    My pain doctor and neurologist conspired to have me start using marijuana 3 months ago. I lost 35lbs and immediately no longer needed my 2-100mcg every other day fetanyl patches. They were completely shocked as they claim it’s highly unusual to just stop taking fetanyl especially at my dosage. The weight loss is a major blessing I’m absolutely thrilled as 6 years of steroids (methyl prednisone) hasn’t been good for my weight. I highly recommend marijuana for weight/pain/seizures if it’s legal for you of course.

    • Tameika#6

      March 22, 2017

      Hi Hun, how much marijuana did you have to help you lose weight? I don’t want to be dependent on it.

  • Christopher Wortman#7

    May 23, 2015

    Personally I eat less and do more when I’m high because I’m far happier and feel really good. I enjoy life more, I go to church and hang out with family more because of weed. My work has improved, and I’m better at what I do because I’m content and happy to do it. Stoners who are lazy when they’re high are probably already lazy to begin with. I suffer from severe depression and antidepressants weren’t working. I think marijuana saved my life. I call it my Jesus plant. It’s allowed me to get peace in my soul to get closer to God and admit my sins. The only people who want this to be illegal ate evil or ignorant.

    • Angel#8

      June 4, 2016

      That’s wonderful! It’s helped me tremendously as well

  • Mike S#10

    February 19, 2015

    I’ve lost 40lbs this way in six months. Yes it makes me hungry temporarily, but the rest of the (next) day I have very little or no interest in food. You quickly get to a point where you’re not hungry if you’re not medicated. It almost seems to be flattening out my blood sugar curve throughout the day. I don’t feel hungry (unless I want to be).

  • Carl#11

    September 18, 2013

    I fully realize an anecdotal post in a comment box isn’t exactly a university study.
    That said, my wife and I have both experienced amazing weight loss from daily cannabis use. Over the course of the last 4 years, I have lost 30lbs, and she has shed 80lbs. This is with no conscious change in diet, no dramatic increase in physical activity, and no “miracle pill of the week”, from a late night TV ad.
    I am not a scientist, but the results are clear to both my wife and I.
    The other affects, for us, are amazing. My wife is no longer on any asthma medication, after being on an inhaler since she was 13. After a Depo-induced stroke at 30, she had terrible migraines, requiring a trip to the ER for a Demerol shot, at least 3 times a year. Not one shot in the last 4 years. She was on two powerful heart medications for tachycardia. Now she takes 1/4 the dose of one, and has discontinued the other. Cramps? One hit and gone. I get my smiling wife back!
    For myself, with degenerative arthritis of the spine, I get a 40-50% reduction in pain overall, and no more of the crippling spasms that left me using a walker several times a year, at 38 years of age.
    Negatives? There are a few, but they are relatively minor, for the benefits gained. I have some loss of motivation, but it is difficult to discern from the depression I have had most of my life. That may or may not be cannabis related. The risk of arrest is always there, though we have our “cards” in a med state. The social stigma may take another generation to diffuse as well.
    Many people still shun the idea of cannabis as a medicine, despite thousands of years of use for that very purpose.
    Just passing on my personal experience with this drug, for whatever it’s worth. I cannot name another medication with less harmful effects, or one that treats more problems for us.

    • Des#12

      October 8, 2015

      Hi guys, can you suggest a strain that will help? Newbie here, Im leaning on the high Thcv stuff, strains hard to come by here it seems. 🙁


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