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  • Noe Marcial

    We didn’t know how much popular it was nutritionfacts untill… Now. here the last publish study on please notice the nice Pic at the end…

  • Noe Marcial

    It have Myopia, a environmental cause? there for is myopia preventable ?
    it is another topic, related to eye vision that i will love to see in the coming videos.

    “Research proving the environmental cause of myopia. Some children are born with a high degree of myopia. This is a congenital birth defect. This can have many causes, such as drug use by the mother, and is not covered here. This site deals with acquired myopia, which is caused by an abnormal visual environment. Here is a sampling of research done in the USA during the past several decades that has provided evidence that this acquired myopia is not hereditary, but environmental.

    1) Since the eyes of certain monkeys are nearly identical to human eyes, a hood was used to restrict the vision of such monkeys so that they could see no farther away than 15 inches (38 cm). It was found that most of them developed high myopia just as humans do (Francis A. Young, “The Development of Myopia,” Contacto 15, no. 2, June, 1971). Monkeys living in the wild, however, do not develop myopia (Francis A. Young, “Visual Refractive Errors of Wild and Laboratory Monkeys,” Eye, Ear, Nose and Throat Digest 27, August, 1965).

    2) The vision of Eskimos living on the northern shore of Alaska was examined. It was found that the parents and grandparents, who were illiterate and living a typical outdoor life, were not myopic. Of the children, who had the benefit of compulsory education, fully 60% were myopic (Francis A. Young et al, “The Transmission of Refractive Errors within Eskimo Families,” American Journal of Optometry and Archives of the American Academy of Optometry 46, no. 9, September, 1969). Primitive or illiterate people around the world generally do not develop myopia. How can this be explained by the heredity theory?

    3) In a study entitled “Bifocal Control of Myopia,” Kenneth H. Oakley and Francis A. Young described how they used bifocals on children to reduce their rate of myopia progression to a fraction of what it would have otherwise been. (American Journal of Optometry and Physiological Optics, 52, no. 11, November, 1975). For the full report, read Bifocal Control of Myopia.

    4) Navy submarine personnel, working in a confined visual environment, develop myopia much faster than other personnel (Ira Schwartz and N. Elaine Sandberg, “The Effect of Time in Submarine Service on Vision,” Medical Research Laboratory Report no. 253; Bureau of Medicine and Surgery, Navy Department project NM 003041.57.03).

    5) In a study entitled “Accommodation, Refractive Error and Eye Growth in Chickens,” and published in Vision Research., Vol 28, No. 5 pp 639-657, 1988, Pergamon Press, Frank Schaeffel, Adrian Glasser and Howard C. Howland found that:

    All eyes treated with positive lenses became consistently more positive (hyperopic).

    Negative lenses produced more negative (myopic) refractions (focal states) in all eyes.

    In a test of plus/minus lenses on left/right eyes, the eye with the plus lens moved in a positive direction. The eye with a minus lens moved in a minus direction.

    The control group did not change significantly in any direction.

    6) In a study entitled “Bifocals May Slow Progression of Nearsightedness in Children,” published in the January, 2010 issue of Archives of Ophthalmology, and reported in Science Daily on Jan. 12, 2010, further proof was found:

    Desmond Cheng, O.D., M.Sc., Ph.D., then of the Queensland University of Technology, Brisbaine, Australia, and now of Hong Kong Polytechnic University, Hong Kong, and colleagues conducted a randomized controlled clinical trial among 135 Chinese Canadian children (average age 10.3) in one practice with progressing myopia. Participating children were assigned to one of three treatment groups: 41 wore single-vision lenses, 48 wore bifocals and 46 wore bifocals with prism, which helps the eyes work together.

    Of the 135 children, 131 completed the 24-month study. Progression of myopia was most rapid among those who wore single-focus lenses, slower among those who wore bifocals and slowest among those who wore prismatic bifocals.

    Recent statistics show that In the United States the prevalence of myopia for individuals aged 12 to 54 years was significantly higher in 1999 to 2004 than in 1971 to 1972 (41.6 percent vs. 25 percent, respectively).

    The amount of acquired myopia in the Far East is much higher than in the USA. The large amount of study needed to master and use oriental characters is thought to be a contributing cause. For a summary of research on this topic, see Myopia Prevalence in Asia.”


    • Noe Marcial

      in paralel to that, exist a correlation in cultures with more academic studies and the development of myopia..korea is an example of that , and India too.. as well that countries with no strong educational system have very little myopia in them ..
      that may mean that been constantly focusing close during the development of the eye may course a deformation that produce the myopia.. that’s not mean that is bad to study but is needed to expend more time looking far away for a healthy development of the eye..

      May be we have to find a way to study outside not only for the health of the eyes but the whole body of a kid is force to stay sit for 6 hs.. mowing that is bad for his health

      any way that’s still unclear.. so i whant to know whats the best science available says in relation to this problem..

    • justme

      I have no studies or proof but I thought the focusing of near and far is what gives you balanced eyesight .. and also doing it in daylight, outside .. something about vit. D helping with your eyes, and the constant change in focus from near to far objects, ? I dunno .. I’m a stumbler without my eyeglasses? So dad might of been right in saying too much T.V. will ruin your eyes, but then I was a heavy reader in my younger than now days.

      • Rebecca Cody

        I have two or three books on overcoming myopathy with eye exercises. Unfortunately I’ve never actually tried any of them…but with excellent nutrition, hydration and exercises perhaps we could all improve poor eyesight.

        I’ve always been more of an indoor type, loving reading, sewing, knitting, embroidery, and, as a child playing jacks, pickup sticks, and dolls. No wonder I was in glasses for myopia by age 12! I also enjoy hiking, walking in town, some gardening, etc., but that all came later, long after the need for glasses.

  • Noe Marcial

    personally i suffer from dry eye for few years, specially during night after been in the computer for few hours.. then i cudt open my eyes in the morning.. i have notices a relation with sodium intake and fat.. (basically when i went to eat outside) but probably salt make me dehydrated, i dont know… but for me changing to eat more plant food and take away cheese and eggs from my diet have cure the problem complete.

  • Noe Marcial

    haha bananas for potassium? may be are 100 food before bananas, no? dr Greger
    sorry i did so may comments!

    • SeedyCharacter

      No need to apologize, Noe. I enjoy your comments.

    • Joseph Gonzales R.D.

      HA! Well… as you are correct about bananas I must defend the good doctor as he named beans and nuts as potassium sources. Of course we have more on potassium and what foods have the most.

      I agree with Seedy – love the comments!

  • lilyroza

    I’m on a pretty nutritious vegan diet, but inmy late 50s I developed dry eyes. My doctor prescribed artificial tears. It was a huge drag, even with the medicine. Online, I saw recommendations to raise omega 3’s. Started taking flax 1.5 T a day religiously, fixed it right away. (Might have also gotten a bottle of algae DHA). 5 years later still no problem at all. I’m sure I was drinking 6 to 8 glasses of liquids a day all along. But as a side note, I now find I do much much better on twice as much hydration, drinking 11 to 16 cups of fluids a day. It improved my asthma as well. (the increased water).

    • Thea

      lilyroza: Thanks for sharing your story. That sounds like a really great tip for people who are experiencing the same problem. Also, when I read your post, I thought to myself how clever it was of you to take advice about omega 3s and turn to flax instead of fish oil. Smart person!

    • vegemarian

      My story is very similar. Whole food vegan in 2007. Dry eyes came on a couple years later around age 50. I remember increasing DHA supplementation, I think to 500 mg/day and the problem disappeared right away and hasn’t come back. (I now take Minami brand vegan dha, 3 caps/day which is 600 mg) My dry skin also disappeared this way, although I think Vit D supplement may have also contributed to the improvement.

    • great to hear others confirm this – i was taking just flax and it seemed to help a bit but then read that flax mostly converts to just EPA (if our bodies can process it from ALA at all, as they have to have a host of other elements present), but read to add algae as that mostly converts to DHA, so now am using both to get the balance of both DHA and EPA. So, fish oil apparently gives both in easier to process fashion but although I don’t have to stay with a vegetarian supplement, lots of articles seem to be against fish sups – why?

      • lilyroza

        I just realized that you left this reply. My understanding is that the conversion of flax omega 3 oils to epa and dha are facilitated by obtaining the right balance of omega 3s to omega 6 oils in the diet. For a person eating plant based, that means making every effort to keep omega 6s in the diet low, which has many other health benefits. I believe I got that from Becoming Vegan, the nutrition book. An easy way to know if you are consuming fats in proper ratios is to use, though i believe this benefit is only available to paid subscribers ($5 a month?) As for your question about fish oil, just search it in the search field of this website. Dr Greger explains it very well. Enjoy this free service, aren’t we lucky?

  • MaryFinelli

    Cool picture! Great way to symbolize dry eye.

    • Maureen Okun

      Yes, very cool! In fact, the site has consistently great images. Who is the genius behind the NF graphics?

      • Noe Marcial

        i agree, excellent Graphic communication!

      • brad

        you can find the graphics creator under Acknowledgements (right beside Sources Cited). People make their works available under the Creative Commons license.

        • Maureen Okun

          Thanks, Brad—good to know.

  • William Dwyer

    Also, omega-3 fatty acids and gamma-linoleic acid, which is found in black currant seed oil and evening primrose oil, have been shown to help dry eye. There are supplements on the market containing these fatty acids that are recommended for dry eye. A friend of mine, who had dry eye, tried them and they helped her overcome it.

    • yes that is cool too, our bodies need these oils in balance omega 3 and omega 6 but we do tend to get rather a lot of omega 6 from other foods, and not enough omega 3 generally – they are great for brain, skin, nerves, cell function, a whole host of reasons to get this right, as well as for the eyes

  • Had lasik, got dry eyes from the operation. It can be irritating. Although I have to say I was nearly blind, so the trade off is basically worth it for someone like me. I wouldn’t recommend it for someone with mild vision problems though.

  • Nancy Nowak

    Does drinking herbal tea count towards the necessary 8 cups a day required for women? How about green tea? Would that make things worse? I have dry eyes and dry mouth syndrome. Mostly at night. Thank you for your help!

    • Thea

      Nancy: The information from the following NutritionFacts video may be an answer for you:

      Specifically note: “We can also get water from all the other drinks we consume, including caffeinated drinks, with the exception of stronger alcoholic drinks like wines and spirits. Beer can leave you with more water than you started with, but wine actively dehydrates you.” But the devil is in the details. So, I recommend watching the whole video, including the parts at the end.

      • Nancy Nowak

        Thank you Thea. I did watch the video that you suggested. At the end though, Dr. Greger said that the tests for cancer and heart disease only tested actually water, not other drinks. So maybe I should drink less herbal tea and more plain water. I follow a plant based diet but still have had breast cancer and a heart bypass operation. Now I have dry eyes and dry mouth. I have found that Xylimelts helps so much with dry mouth at night. I am 75 years old.

        • Thea

          Nancy: I like sucking xilitol-mints too! I suck them just for fun. I’m glad they are helping you with a real problem. Good luck.

    • herbal tea does count as the same as water, and in some ways better as green tea for example includes a fantastic antioxidant…… just make sure it is proper herbal teas and not infusions…….. juice etc does not count as water as it has sugar which just undoes any good effect – also if we have fresh juice at all it needs to be WITH the fibre so the body can process it right and get the benefits

  • PLA

    Interesting and glad to see a video on dry eyes. I have had severely dry eyes (especially at night) for 4.5 years. Mine is not due to lack of drinking water and I have not had lasik surgery. My eye symptoms started within days of taking a T3 therapy to ‘jumpstart’ my sluggish thyroid (per an
    ND) 4.5 years ago. The ND told me I might feel awful, and I did, so I hung on until I couldn’t take it any longer—extreme fatigue, very dry eyes on waking in the middle of the night, hard to sleep, night sweats, pain in my feet on waking in the middle of the night. I stopped after 6 weeks and slowly began to feel a little better, but the dry eyes have not gone away, and the pain in the feet only slowly—still some ‘knumbness and tingling’ at times.

    But it wasn’t until a month or so ago that I found out that ALL of my symptoms (life-long symptoms–including migraines, PMS, preterm labor, terrible morning sickness with my 2 pregnancies, life-long irritability, bladder issues, constipation, night sweats, hot flashes, memory issues, premature,
    skin wrinkling, cataracts, excessive spider veins, DRY EYES, and more) are due to LACK OF MAGNESIUM. I am now using transdermal magnesium, oral magnesium (ReMag from Dr Carolyn Dean), some oral mg citrate as Calm (but not too much….it causes diarreaha and this is the reason I was not getting much Mg and did not know it) and some mg citrate capsules, and finally, I am noticing some changes. In two weeks of supplementing, I am sleeping better, less constipation, and have more energy than I have had in 4.5 years, my feet feel better, and my eyes are not as dry. Still not normal, but getting better. I am also using magnesium CL drops in my eyes when they get dry. A mix of distilled water and MgCl (Ease MgCl…see Dr Mark Sircus’s article about this).

    One thing I notice is that my eyes get markedly more dry at night when I have eaten something salty during the day. The salt may be displacing water in the cells…..and possibly worsening my magnesium deficiency.

    I hope Dr Greger does a video on the many, many symptoms of magnesium deficiency and how much proper mg supplementation can reverse many of them. I have found the answer I have been looking for for over 20 years.

  • David Barbour

    …and there wasn’t a dry eye in the house!

  • Jim Henry

    What a refreshing post coming on the heels of the NYT post a few days ago that claimed that drinking lots of water as a health benefit was not scientifically substantiated. Water lubricates! And it can lubricate not only eyes, but also, in my case, my spinal column. When I went on a 6-8 glass-a-day water regimen a few years back, my trips to the chiropractor all but disappeared. Thanks, Dr. G!

  • Atlantisarch

    My mother has this issue for years and that is trouble some. Could the global deshydratation be linked to a deficiency in salt ? Or with a lack of something ? Because she is drinking far enough (even if not regulary, I’ll ask her to test that out).
    Will try the vitamin A way too, as it did work wonders on getting my sight sharpness back. Can’t wait to see other videos on that matter.

  • And do avoid LASIK Surgery! Go to for ten major reasons why. Some suicides were done because of the big harms that resulted from LASIK surgery!
    I researched and decided to not let my two daughters do LASIK! My Letter to the Editor of my local paper concluded with “If LASIK Surgery was the only means to correct vision, then the Nobel Prize would go to the inventors of the very superior ways to correct vision of glasses and contact lenses!”

  • Joy Schwabach

    I agree that omega 3s really help prevent dry eyes. But too much time with screens, especially small ones, can still dry my eyes out.

  • vegank

    for children and individuals with sensory disorders including autism it’s often the texture of fruit & vegetables they can’t handle, but they tend to like textures like sauteed mushrooms , Tofu , and will accept smoothies with a thick straw if not directly from a cup. I understand that whole- plant food is far better for you than smoothies, but seeing videos like this reminds us that we need to experiment and research until we can get children to accept & enjoy plant foods.

  • Janet Allen Strahan

    I do enjoy your videos, but please give us a warning for graphic pictures. I can’t get the picture of the open face out of my mind.

    • Joseph Gonzales R.D.

      Thanks for the suggestion we’ll consider adding a warning about graphic content to our videos.

      • George

        Hi Joseph: I remember reading somewhere that everybody needs to get some pre-formed vitamin A, no matter how much beta-carotene from whole plant foods he/she gets. Is there any truth to this claim? Thanks

        • Joseph Gonzales R.D.

          Hi George. I have also heard this theory, but have not seen any research support the claim. The Institute of Medicine considers “retinol activity equivalents (RAEs). 1 RAE = 1 μg retinol, 12 μg β-carotene, 24 μg α-carotene, or 24 μg β-cryptoxanthin. The RAE for dietary provitamin A carotenoids is twofold greater than retinol equivalents (RE), whereas the RAE for preformed vitamin A is the same as RE.”

          So in short, the carotenoids provide “equivalents” and there is no need in the diet for preformed vitamin A.

  • Alx

    I am wondering if anyone has had any experience with Sjögren’s syndrome, which is an autoimmune disease affecting primary the salivary and lacrimal glands (i am pretty sure that many of those suffering from dry eyes might actually have Sjögren’s disease). Actually i am wondering if anyone around here has experience in improving the life of people with autoimmune diseases like Sjögren or Lupus. Is a plant based diet really helpful? How is it with grains – lots of the stuff that i have been reading is against grains/gluten products even for tjose not having gluten intolerance. Are soy products bad/to be avoided in autoimmune diseases?

    Thanks for any answer,

    • Charzie

      Alex, I had the problem for years, and when I switched to a plant based diet to fight diabetes, not only was that quickly accomplished, but a whole slew of other chronic health problems also resolved over time including severe arthritis, fibromyalgia, thyroid issues, IBS, obesity, and on and on. Don’t take my lone word for it though, check out some of these for the effectiveness of a WFPB diet on better health…
      As for the grains, etc, I often ferment them for max benefits, but not always and have no problems. I stick to traditional, “real” soy products, (tempeh, tofu, miso, soy milk) not the fake foods or isolates, and notice actual benefits. Once my body began to heal, I found that as long as I stay away from animal products and processed stuff including oils, all is good, but if I “regress” I pay for it. The older we are obviously the longer it will take to repair and rebuild, but it DOES happen and it is the rule not the exception!

    • Charzie

      Alex, I had the problem for years, and when I switched to a plant based diet to fight diabetes, not only was that quickly accomplished, but a whole slew of other chronic health problems also resolved over time including severe arthritis, fibromyalgia, thyroid issues, IBS, obesity, and on and on. Don’t take my lone word for it though, check out some of these for the effectiveness of a WFPB diet on better health…
      As for the grains, etc, I often ferment them for max benefits, but not always and have no problems. I stick to traditional, “real” soy products, (tempeh, tofu, miso, soy milk) not the fake foods or isolates, and notice actual benefits. Once my body began to heal, I found that as long as I stay away from animal products and processed stuff including oils, all is good, but if I “regress” I pay for it. The older we are obviously the longer it will take to repair and rebuild, but it DOES happen and it is the rule not the exception!

      • ad

        It gives me hope reading your post. I hope it can be that “simple” as switching to a plant based diet in my case as well.
        All the best,

    • Joseph Gonzales R.D.

      Great question, Alex! Actually I have a lot of info on this. Since Sjogren’s syndrome often accompanies other immune system disorders, such as rheumatoid arthritis (RA), perhaps a diet for RA could be helpful? Nutrient intake is altered in Sjögren’s syndrome and could be addressed. Some research suggests omega-3 fats may play a role helping to reduce dry eyes (bingo!). Here is one case study on a women who reduced inflammation and began normal menses with an elimination diet. She eliminated gluten, beef, eggs, dairy products, nightshade vegetables, refined sugars, and citrus fruit for 4 months. Authors conclude “restoration of normal menses was caused by reduced inflammation in the ovarian tissue and supports the hypothesis that the gut immune system can influence autoimmune disease and inflammation.” I would consider avoiding cow’s milk, as there has been a link to milk sensitivity in those with the syndrome and maybe even gluten. Following a diet for RA may be very beneficial for Sjogren’s as well.

      Check out our videos on RA. I helped publish a study on migraine headaches. At first we had some patients with arthritis, as this was kind of a study looking at potential pain trigger due to foods. We put them on a strict plant-based diet, adding an elimination diet phase within the study to see if they could identify any triggers. You can read more about our design here.

      Let me know if any of this helps?


      • ad

        Thank you for the comprehensive answer. Please keep posting videos for people with autoimmune diseases. (might sound selfish because i have one, but it seems to me to be quite a lot of people having autoimmune diseases.) Medicine seems to have so little to offer when it comes to treatments. And it’s hard to find the best diet, when there is so much conflicting info in the media.

        All the best,

  • mocarter

    Of course, Dr. Greger, you know that Vitamin A is found only in animal products.. Beta-carotene is found in fruits and vegetables which can be converted to Vitamin A. More fruits and vegetables is how one increases vitamin A without overdosing.

  • Rodrigo Cardoso

    For all the Portuguese speaking fellows searching for this topic in Google or Youtube, your chances of finding quality info have just increased:

  • zm4jk0

    Yes! Lower protein intake (also nuts and seeds until feeling much better). And increase hydration (especially through increased quality fresh fruit consumption). Why? More protein = more inflammation, more dehydration and more waste for the body to clean.

  • SeedyCharacter

    A new study, appearing on the Vitamin D Council newsletter citing vitamin D deficiency contributing to dry eyes:

  • Artshawn

    What about blepharitis? My father-in-law suffers from this. He has been to many doctors with no luck. He has been to specialist at the Univ. of MI. He is even had eye lid surgery done in Florida that did not help. I understand that it is a chronic inflammation of the eye lid with no cure. Since it is a “chronic inflammation”… have there been any studies done on this? Thanks for any feedback…

  • Vardan D

    Hi Dr Gregor
    Thanks for the great work,
    Very important question
    Is distilled water safe to drink?

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