Doctor's Note

The spice saffron is one plant in particular that may help. See Saffron for the Treatment of PMS and Wake Up and Smell the Saffron. In my next video I’ll cover another, in Flax Seeds For Breast Pain.

Another reason meat consumption may interfere with ovulatory function is explained in my video Meat Hormones & Female Infertility.

The extraordinarily low rates of chronic disease among people eating traditional plant-based Bantu diets was one of the inspirations for Nathan Pritikin’s work. See the series of videos that starts with Engineering a Cure.

More on the medical profession’s traditional views on women in my video Plant-Based Bioidentical Hormones. And I have more than a hundred other videos on women’s health.

For some more context, check out my associated blog posts: Plant-Based Diets for PsoriasisTreating Breast Pain with Diet,Treating Breast Pain with Flax Seeds, and How Probiotics Affect Mental Health

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  • Jessie

    This does not surprise me, since i have switched to a vegetarian lifestyle, that time of the month is pain free wish i knew this 12 years ago..Great video=)

  • Marie

    Thanks for sharing this video. This is a problem for me – glad to know I’m doing the right thing to help. I would love to know if anyone has any info on the safety of natural progesterone cream. Even though I do all the things suggested for PMS on this site: mostly dairy free (and meat), drink green tea daily, eat lots of flax, b12, b6, magnesium, even smell saffron everyday at least once :), if I don’t use progesterone cream too, I’m a mess! Anything I’ve missed?

  • Christine

    Since taking on a mostly raw vegetarian diet I find that my period surprises me with its arrival. Before, on a “junk-food vegetarian” diet – hey, potato chips are vegetarian, right? – I find I no longer have menstral cramps. None. Zip. And the cure was so elegant, so simple: Eat Plants.

  • Thea

    Sadly, my menstrual cycle problems, which feel pretty awful to me and which interfere in my life, have had no change since switching to a plant based diet 3 years ago. (sad, long sigh) I wonder if it has to do with me eating animals for the first 40 years of my life. My body may just be permanently messed up. (Acne never cleared up either.) I know from recent blood tests that I have certain hormone problems that diet has not cleared up.

    That doesn’t mean that I will stop eating healthy. This is my take-away: It means that we have to be careful (and I’m not saying the video wasn’t careful) when we tell people about plant based diets. Not everyone experiences the noticeable health benefits that the majority of people experience. Despite how it seems sometimes, a healthy diet is not magic for everyone. We just have to be careful when explaining healthy diets to people.

    Just sharing the thoughts I had after hearing this video. I am happy for the people who get significant benefits like pain reduction.

    • Very good point, Thea.

    • Plantstrongdoc

      Great comment. A whole food plant based diet is not a cure for all ailments. Many of us have been eating the wrong foods for 30 or 40 years, so damage has been done. A lot of different diseases will not be cured, because you change your diet to a whole food plant based diet – simply because the disease has nothing to do with food, the damage is permanent or because biology is complex. On the other hand the body has a great capacity to heal, so no doubt that “wrong-food-induced-diseases” (cardiovascular disease, diabetes, hypertension, inflammatory conditions etc) can improve, be reversed or even cured with a plant based diet. That said, a whole food plant based diet reduce the risk of acquiring diseases – heartattack, stroke, cancer, DM, hypertension etc, so it is not only a cure, but also an insurance.

      Another thing is that “real medicine” – pills – do not work on everybody – you are probably familiar with the term “number needed to treat” (NNT). NNT show how many patients you have to treat, to avoid an event (disease, death) in one patient. For some drugs it can be 100 – you have to treat 100 patients for one to benefit. Changing your diet has (probably) no sideeffects, so no harm done if it doesnt work.
      benefit! Changing your diet has (probably) no sideeffects.

    • Lots of ways to eat a plant-based diet: high or low fat, high or low protein, raw or cooked, fruit-based, grain-based, no grains, high or low vegetables, and so on. Perhaps you have not yet found the proportions and application that you need to heal your condition. For example, I know people who need to avoid cooked grains to establish health. Perhaps if not tried yet a high raw Jenkins style ‘simian’ style diet would help you: fruits, vegetables, only those beans and grains edible raw (e.g. peas and corn), nuts, and seeds. Dr. Greger says a bit about Jenkins here:

      • Thea

        donmatesz: Thanks for your reply. Interesting idea about eating the simian style diet. My mother always called me a little monkey. ;-) (Sorry it took so long for me to reply.)

    • Thea

      Thank you to everyone who replied. That was nice.

      Don Matesz: You could be right that I just haven’t found the right diet. Also, I am always the first to say that I have PLENTY I could do to improve the health level of my diet.

      That said, I’m already eating so much healthier than the vast majority of people in America, and I’m already eating the type of diet that the vast majority of people report great benefits from when they bother to switch. My diet is filled with home-cooked, whole plant food based foods, supplemented with B12 and D. (Not that I don’t ever eat white flour, sugar, or oil…) Also, I don’t believe we have enough science to say that a more specialized say raw diet would make any difference. Going to a raw diet would be very hard for me to do. For me to make the effort, I would have to believe that it would really help. I just don’t see it.

      But I do appreciate you taking the time to offer suggestions. This is the kind of thing that I let sit in the back of my brain for a while. I very well may reconsider at some point and follow your advice at some point in the future.

    • Maj0

      Did you concider fasting? Body works miracles when fasting. Try searching for details and give it a try if you can.

      You should also keep in mind that food isnt the only thing coming into our bodies. There are poisons everywhere in our environment and they can pass into our system even by a simple touch.

      A good example are estrogen mimicers in plastics, pesticides, …

      Just try increasing your green smoothie/vege jucie intake if you can’t do fasting.

      You can read a lot more about hormone disruptors on the internet.

      • Thea

        Maj0: the fasting idea is very interesting. I read the book The Pleasure Trap which talks about the benefits of fasting. I’ve done religious 24 hour fasts, but nothing more than that. It’s definitely something to think about.

        I no longer store or cook food in plastic. I don’t use pesticides or herbicides (other than vinegar) in my yard either, but of course, that doesn’t mean that I’m not exposed thanks to my neighbors or at parks.

        Thanks for the thoughts.

        • Cory

          Dr. Fuhrman wrote a book about fasting in the 90s. I’ve read a ton of books on the subject and I have found that his book is the most credible. If you have given any more thought about trying an extended fast definitely check out ”
          Fasting and Eating for Health: A Medical Doctor’s Program for Conquering Disease”

          • Thea

            Thanks Cory, that’s really helpful. I have some issues with Dr. Fuhrman, but I’m a big believer in not throwing out the baby with the bathwater. If this is a good book, then it is a good book not matter who wrote it. :-) Thanks again.

    • b00mer

      Perhaps the severity of your issues might be even worse if you didn’t follow the plant based diet? Who knows what kind of additional medications, surgeries, etc, you may have required by now if your diet were not as healing and health-promoting as it is now? I don’t know if that’s an uplifting or depressing thought, I certainly hope the former! All the best, and I hope someday you do find some relief.

      • Thea

        b00mer: Thanks for your thoughts. I’ll just go with “uplifting”. ;-) And I do try to console myself with similar thoughts. Thanks again.

    • Niki

      Me too.. I’m 21, vegan for 3 years.. acne not cleared up. Still have breast tenderness and severe cramps. But I don’t eat a low-fat or super healthy vegan diet.. even though I try. So that might have something to do with it.

      • Thea

        :-) Best of luck to you Niki!

  • Off-topic but interesting recent research: Not only do humans have evolutionary adaptations to high-starch diets (, but it appears in the course of domestication dogs adapted to eat starch as well (

    • Thea

      Darryl: I haven’t followed your links, but I am aware of the relatively new study on dogs’ digestive systems in regards to starches. I find the study fascinating. It fits in so nicely with the theory that dogs evolved from hanging around human settlements and eating human trash/food discards.

      I don’t know if this is related to the study results or not, but I can say that my vegan dog is in great health. He seems to digest his food pretty well.

  • OutsideMom

    I switched to a plant-based diet on April 1 of this year. So I’ve been eating this way less than a month. I have had 3 children, and since my last child was born in 2010 I have gained back 20 pounds after not losing all of my baby weight, putting me 40 pounds over my pre-baby weight from before my 1st child. I’ve also noticed my cycles became shorter between periods (it used to be 28 days on the dot, and since he was born it was closer to ever 24-26 days) but my periods have been heavier and I’ve had greater mood swings throughout my cycle. I attributed some of this to nursing, but as nursing starts to taper off, my body should have re regulated itself.

    Not only have I lost 8 pounds since starting a plant-based diet, I also had an unexpected change relating to my menstrual cycle. When I started this diet, I had just finished bleeding and was about a week away from my normal ovulation time. I started my most recent period this week and marked it down on my calendar- it’s been a full 28 days since my last one! This hasn’t happened in years. Also, the bleeding is not as heavy and I did not experience any cramping or mood swings like I have in the past. I am just so amazed at how quickly my body has seen benefits to this diet beyond just the weight loss.

    • Thea

      OutsideMom, This is so inspirational! Thanks for sharing.

  • Dr. Gregor, did you see this study yet? I was wondering if you did a video or article on; wanted to hear your take.

  • I’ve been vegetarian for years but it wasn’t until going mostly vegan and improving and increasing my vegetable intake AND cutting out refined sugar that I experienced amazing relief of menstrual cycle symptoms. I used to be very emotional during the premenstrual phase and sometimes have cramps and other uncomfortable things. Now I either have no symptoms or symptoms are so minor I can ignore them. My body no longer warns me of an upcoming menstrual cycle and I have to keep an eye on the calender.

  • Robin Everson

    This video does not load. I have tried several times over the past few days.

    • Anyone else having a problem with this video playing?

      • Nina

        Yes – starts and stops.

        • JacquieRN

          Hi Nina, I checked the video and it played the entire way through without a hitch. So I would suggest you read the transcript that is available below the video.

  • Ann Van den Broeck

    Can you do a video about evening primrose oil?
    I use this and have a lot of benefit for it: better skin, regular periods, less tired

  • Rose

    This video surprised me somewhat. I am vegetarian since 20 years (I’m 38 now), with some fish and egg occasionally. I became vegetarian gradually. We never had much meet and I grew up without junk food, on a whole food, plant based diet with loads of raw veggies – only seasonal veggies and more veggies than fruits (I am European). Nevertheless, I always had premenstrual breast pain – quite a strong one. In fact, it helped me to track and predict my cycle with a 100% accuracy.
    Nevertheless, interesting content! Thanks.

  • yerba buena

    I have been vegan for years and eating healthy whole foods for a bit over a year. Last year I started experiencing menstrual irregularities and a few other symptoms. As it turns out, I have mildly elevated prolactin. My doctor says it’s not high enough to warrant taking medicine, but she put me on the pill. I still suffer from other symptoms of high prolactin. I wish there was something I could do!


    I have been having breast pain for some time and happened on this video. So, trusting Dr. Greger with my health, I switched to a vegan diet. THE RESULTS WERE INSTANT AND PROFOUND!!!! I had none of the discomfort and pain… So, to experiment, I ate animal foods. THE PAIN RETURNED!! I am now making my meals vegan and do not want to look back!!!!!

  • Kate

    What is the reason of losing ovulation and period when switching to a High Raw or Raw Food diet (there are many reports of this). Thanks

    • Thea

      Kate: My go-to reference for the topic of eating a raw vegan diet is “Becoming Raw” by Brenda Davis RD and Vesanto Melina MS RD. These two authors are well respected and even have a guest blog post on NutritionFacts (so their information is consistent with the quality of information provided here on NutritionFacts). I recommend getting that book if you are at all interested in going even High Raw. It seems to me that the diet must be done carefully if it is going to be done in a way that supports health.
      One of the problems with a raw diet can be getting enough calories. Here are some quotes from page 40 of the book. You would have to get the book to look up the references yourself:
      “The calorie intakes of raw-food adherents are consistently below those of the general population, and below levels commonly recommended for adults. … 31, 33, 35, 55, 70, 76, 80, 81, 83 … These intakes are significantly lower than those typically considered necessary for healthy adults, although they are suitable for weight-loss diets. … In one study, about 30 percent of the women younger than 45 years of age had partial to complete amenorrhea (cessation of menstruation) due to low body weight. 69”
      A carefully planned diet can avoid the problems commonly seen with raw diets, but I would caution people to get advice from science-based book like Becoming Raw rather than following popular advice.
      Hope this helps. What do you think?

  • Judy Fields Davis

    Thank you so much!