Doctor's Note

Here’s the link to the video I refer to on treating Crohn’s: Dietary Treatment of Crohn’s Disease.

For more on that list of troublesome compounds noted in animal products, see Estrogenic Cooked Meat Carcinogens for the heterocyclic amines; Chicken, Eggs, and Inflammation for arachidonic acid; Meat Additives to Diminish Toxicity for heme iron; Yersinia in Pork for the inflammation-linked bacteria; and Lowering Dietary Antibiotic Intake on some of the drugs fed to animals. I’d also add to that list The Inflammatory Meat Molecule Neu5Gc, and Dead Meat Bacteria Endotoxemia.

My other videos on food additives include:

For more context, check out my associated blog post: Should We Avoid Titanium Dioxide?

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  • Hey Dr. Greger, Which article has the pretty chart shown at about 5:20?

    • Based on where the graphic “flies out” from, I’m going to presume that you can probably find it in: J. C. Schneider. Can microparticles contribute to inflammatory bowel disease: Innocuous or inflammatory? Exp. Biol. Med. (Maywood) 2007 232(1):1 – 2 (mentioned in the Sources Cited section).

      • Sadly, no, I looked and it’s not that one. I can’t seem to find the chart in any of the articles – but I might have missed it. It’s definitely not in the Schneider piece, tho. Thanks anyway! :-)
        It’s not really important, I was just curious.

    • I’ve added it into the supplementary info section above just for you!

      • Thanks so much. Tic Tacs are practically like kale.

  • Dinorah

    Hey doc, thanks for wealth of info! What’s a coffee or tea whitener??

    • Coacervate

      I’m picking your from Aust/NZ? Down here we put milk in coffee. But before immigrating from USA we used “non-dairy” whiteners because you know, they were healthier than actual milk. It is a dried slurry of caseinate (so much for the non-dairy lie), saturated fats, emulsifiers, soy, silica gel and of course white paint. Mmmmm

  • Fidel Castrati

    This is good to hear and hopefully true since many vegans have been able to enjoy the tasty Daiya cheese which has titanium dioxide in it.

  • Coacervate

    The larger message is the lack of principle and values in the food industry. It should go without saying that non-food should not be added to food. And yet we must say it. I know there will be exceptions that some will feel are important. Regardless I am opposed to being forced to analyze labels to decipher the weird crap the food industry does. Would you care for a little silica gel with your titania?

    BTW/ titantia is a photoelectric semiconductor substance. Of course there is not that much sunshine in the colon so I guess it is OK to eat this crap right?

    • Fidel Castrati

      Hopefully eating it isn’t in fact a problem. Breathing it could very well be trouble.

      • Georgia

        Please speak more on the matter of inhalation exposure to nano particles in personal care products. People are off-gassing this horrid stuff. Would Dr. Greger know of research studies? Are there any protective foods once one has been exposed?

      • Sorry Fidel, but eating non food is not acceptable in this house. Breathing it, sucking up ones anus, nostrils ….pick your orifice….All are off limits for this crap in my temple o soul.

  • MikeZP

    Does desiccated coconut are also whitewashed?

  • Shaunti

    Thank you for this video. I have Crohns Disease and my doctor put me on a vegan diet last year and I have been doing much better. This is another reason why I should NOT go back to eating meat or processed foods.

    • JackZ

      You have a good doctor — keep him/her! I’ve seen several stories where doctors actively resist vegan diets and insist on surgery and other invasive “treatments” for Crohn’s Disease.

  • Osher Bachrach

    Thank you, Dr. Greger!

  • Leafy Cafe

    Any info on Kaolin acting in a similar way as Titanium Dioxide? It must surely be a nano-particle and it is used in sooo many things food, including spraying on organic veggies.

  • disqus_KUPcRLuhg8

    Thank you, Dr. Greger. I saw horseradish sauce listed in the video, Titanium Dioxide & Inflammatory Bowel Disease. I searched the site to find more about it to no avail. Please advise. With appreciation, RMM

  • Trina Steele

    Hello Dr.Greger what is your opinion on supplementing with digestive enzymes? Thank-you

    • Toxins

      Unless specifically recommended by your doctor, I would advise against it. If you want a supplement for increased fecal bulking and bowel health then taking psyllium husk is a harmless option.

      • Dan

        Would you recommend the use of brans such as oat bran or wheat bran added to cereals or oatmeal? Thank you Rami!

  • LynnCS

    So glad I have lost my desire (mostly) for prepared food. I am a pretty good “cook” so find it pretty easy to prepare some dandy dishes from scratch using only “from the ground or tree” foods. Now to find the best quality “organic” local and freshly picked produce. I have been toying with the Starch based diet, although find it harder to digest than the all produce all the time diet. I had some problems with that too, but feel it is cleaner. No telling where those grains and beans have been. My fave is sweet potatoes in a soup with onion, celery and cabbage. No whiteners there, but still, I can improve. So now that I am avoiding all these listed, bad actors, why do I still get so sick? How do I get that consistent good digestion? (You know what I mean.) Am I still suffering from all the years of bad additives? Been mostly vegetarian since 1980. That doesn’t mean I’ve been perfect, but I think it has helped me avoid a lot of the problems. Now that I’ve taken this post off track, I think I need to search your archives for some help. Thanks, Lynn

  • Linda

    I was a vegan eating unprocessed organic foods for seven years when I acquired Ulcerative Colitis. I had my first symptoms after received the MMR vaccine. I am achieving remission by implementing the gaps protocol and eating LOTS of animal fats from grassfed good quality meats. A big adjustment for me, an exvegan.

    • Linda

      I cannot eat the high fiber vegan diet any longer without provoking bloody mucusy diarrhea. I cannot eat raw vegetables either. I think cutting out sugar and grains and eating lots of fats like high quality pastured butter, and coconut oils has helped my gut heal tremendously. Along with gelatin in bone broths. I have also lost fifty pounds since May 2012 eating this way.

    • lelo

      I don’t know how much research you’ve done but your vegan diet wasn’t the cause of your Ulcerative colitis. If thats what your saying? Just one place to get more info on it is

    • Dr. J. M.

      If I go OFF my vegan diet I get colitis…. Sudden changes can cause your symptoms, but I doubt a long-term vegan (properly proportioned) is the cause of your symptoms. The GAPS diet would be better called the “suicide diet”. It consists mostly of items known to promote disease and death.

  • sun

    diagnosed with CD, i have stopped taking all the dairy products, since then i have made lot of progress in the GUT “no pain” . can i replace with Almond MIlk from Dairy milk . please suggest

    thanks Dr Micheal greger , you are doing great Job , helping us

  • Evelyn

    I have two titanium hips, do I need to worry about this leeching into my system? I already have elevated cobalt and have just had 2nd blood test to see if it’s worse & if chromium is elevated.

    • Dr. J.M.

      It’s not the titanium per se, it’s the physical form, the microparticles, that are touted to cause the problems. But if you watch the video carefully, there’s not much evidence to consider them harmful. Just don’t eat a huge amount of them. And don’t worry about your hips.

  • Nicole

    I am really looking forward to your video on carrageenan. We are a vegan family and I have seen it in a couple of products we buy. The Cornucopia Institute recommends staying away from it and I would love to see what you think.

  • Dean Pomerleau

    Dr. Greger,
    Are the small titanium dioxide particles in sunscreens a potential problem? Are they small enough to be absorbed into the bloodstream?



    • Dean Pomerleau

      Thankfully it doesn’t look like absorption on titanium dioxide from sunscreen is a problem – see PMID


  • Martha

    Titanium Dioxide is often added to Vitamins and supplements–I stopped taking Jarrow B complex because I noticed in contained titanium dioxide. I’ve stopped many supplements, but I’m essentially vegetarian and have to get B-12 from a supplement.

  • Reena

    Thank you so much for summarizing this data! You are making a big difference in many people’s lives.

  • Jay M

    More evidence: Titanium dioxide nanoparticles increase plasma glucose via reactive oxygen species-induced insulin resistance in mice.

  • fern

    Is this the same titanium dioxide found in sunscreens? Do o we know if it would be just as harmful when applied to the skin topically?

  • Dan

    Much obliged Dr. Greger! Does silicon dioxide pose any danger?