• Join our community!

    Do you have questions about celiac disease or the gluten-free diet?

  • Ads by Google:
     




    Get email alerts Subscribe to Celiac.com's FREE weekly eNewsletter

    Ads by Google:



       Get email alertsSubscribe to Celiac.com's FREE weekly eNewsletter

  • Member Statistics

    74,533
    Total Members
    3,093
    Most Online
    Antoinette Olson
    Newest Member
    Antoinette Olson
    Joined
  • Announcements

    • Scott Adams

      Frequently Asked Questions About Celiac Disease   04/24/2018

      This Celiac.com FAQ on celiac disease will guide you to all of the basic information you will need to know about the disease, its diagnosis, testing methods, a gluten-free diet, etc.   Subscribe to Celiac.com's FREE weekly eNewsletter   What is Celiac Disease and the Gluten-Free Diet? What are the major symptoms of celiac disease? Celiac Disease Symptoms What testing is available for celiac disease?  Celiac Disease Screening Interpretation of Celiac Disease Blood Test Results Can I be tested even though I am eating gluten free? How long must gluten be taken for the serological tests to be meaningful? The Gluten-Free Diet 101 - A Beginner's Guide to Going Gluten-Free Is celiac inherited? Should my children be tested? Ten Facts About Celiac Disease Genetic Testing Is there a link between celiac and other autoimmune diseases? Celiac Disease Research: Associated Diseases and Disorders Is there a list of gluten foods to avoid? Unsafe Gluten-Free Food List (Unsafe Ingredients) Is there a list of gluten free foods? Safe Gluten-Free Food List (Safe Ingredients) Gluten-Free Alcoholic Beverages Distilled Spirits (Grain Alcohols) and Vinegar: Are they Gluten-Free? Where does gluten hide? Additional Things to Beware of to Maintain a 100% Gluten-Free Diet What if my doctor won't listen to me? An Open Letter to Skeptical Health Care Practitioners Gluten-Free recipes: Gluten-Free Recipes
  • 0

    What is gluten? What is gliadin?


    Scott Adams

    Traditionally, gluten is defined as a cohesive, elastic protein that is left behind after starch is washed away from a wheat flour dough. Only wheat is considered to have true gluten. Gluten is actually made up of many different proteins.


    Ads by Google:




    ARTICLE CONTINUES BELOW ADS
    Ads by Google:



    There are two main groups of proteins in gluten, called the gliadins and the glutenins. Upon digestion, the gluten proteins break down into smaller units, called peptides (also, polypeptides or peptide chains) that are made up of strings of amino acids--almost like beads on a string. The parent proteins have polypeptide chains that include hundreds of amino acids. One particular peptide has been shown to be harmful to celiac patients when instilled directly into the small intestine of several patients. This peptide includes 19 amino acids strung together in a specific sequence. Although the likelihood that this particular peptide is harmful is strong, other peptides may be harmful, as well, including some derived from the glutenin fraction.

    It is certain that there are polypeptide chains in rye and barley proteins that are similar to the ones found in wheat. Oat proteins have similar, but slightly different polypeptide chains and may or may not be harmful to celiac patients. There is scientific evidence supporting both possibilities.

    When celiac patients talk about "gluten-free" or a "gluten-free diet," they are actually talking about food or a diet free of the harmful peptides from wheat, rye, barley, and (possibly) oats. This means eliminating virtually all foods made from these grains (e. g., food starch when it is prepared from wheat, and malt when it comes from barley) regardless of whether these foods contain gluten in the very strict sense. Thus, "gluten-free" has become shorthand for "foods that dont harm celiacs."

    In recent years, especially among non-celiacs, the term gluten has been stretched to include corn proteins (corn gluten) and there is a glutinous rice, although in the latter case, glutinous refers to the stickiness of the rice rather than to its containing gluten. As far as we know, neither corn nor glutinous rice cause any harm to celiacs.


    0


    User Feedback

    Recommended Comments

    Guest Colette

    Posted

    Thanks for this. I was tring to work out whether TicTacs were gluten free and the FAQ said something about corn gluten - which mystified me!

    Share this comment


    Link to comment
    Share on other sites
    Guest Vitamin D girl

    Posted

    Just what I was looking for! I was trying to figure out how gliadin relates to gluten.

    Share this comment


    Link to comment
    Share on other sites
    Guest elaine ester

    Posted

    I sent this information to 3 different states. Thank you and keep it coming. Now I need some gluten-free meal plans and recipes.

    Share this comment


    Link to comment
    Share on other sites
    Guest Mims Haske

    Posted

    Very informative. I'm looking for ways to increase my knowledge base while decreasing my waistline. This has been a helpful starting point. Plus I'll pass it on to a friend! :)

    Share this comment


    Link to comment
    Share on other sites

    Ok - I've read that fermenting flour into sourdough bread pre-digests the gluten in the flour and also breaks down toxins that are anti-nutrients. Not sure if this makes it any better for celiac/gluten sensitive people. I haven't read anything on it anywhere in relation to celiac/gluten sensitivity - whether fermenting makes it okay to eat or not.

    Share this comment


    Link to comment
    Share on other sites
    Guest Meshelle

    Posted

    Just happened on an article and video posted on one of the local news stations relating to the "Modern Wheat" featuring Dr. William Davis, a cardiologist who published a book about the world's most popular grain. He had mentioned gliadin that is found in today's version of wheat and how harmful it can be. Not to mention, the wheat of today is produced from a genetic 13" plant. I am a big health nut and big fan of wheat products. Just learned that because it says wheat, doesn't make it any better for me than products made with white flour. I am truly amazed and disappointed that we as consumers are being so deceived and health put at risk for the almighty dollar. Looks like I will be cleaning out my cabinets and pantry and throwing a lot of things out. Have a wonderful and healthy life everyone!

    Share this comment


    Link to comment
    Share on other sites

    In my opinion, you did not address the reason why people are allergic to wheat, for you see wheat as bound in nature is gluten and gliadin as a unit. through genetic modification these two elements have been separated and gliadin now becomes free glutamic acid, which is harmful to everybody. These two bound as a whole are essential nutrients, separated these two become harmful nutrients.

    Share this comment


    Link to comment
    Share on other sites
    Guest Larry

    Posted

    I have stopped eating any wheat products and have reduced my sugar intake as much as possible. My blood pressure has returned to normal (stopped taking BP meds) and my fasting blood sugar has returned to normal. No more bloating and abdominal pain. I feel great!

    Share this comment


    Link to comment
    Share on other sites

    Thanks so much. I was trying to figure out what gliadin is and where it fit into a gluten free diet.

    Share this comment


    Link to comment
    Share on other sites
    Guest david

    Posted

    Just happened on an article and video posted on one of the local news stations relating to the "Modern Wheat" featuring Dr. William Davis, a cardiologist who published a book about the world's most popular grain. He had mentioned gliadin that is found in today's version of wheat and how harmful it can be. Not to mention, the wheat of today is produced from a genetic 13" plant. I am a big health nut and big fan of wheat products. Just learned that because it says wheat, doesn't make it any better for me than products made with white flour. I am truly amazed and disappointed that we as consumers are being so deceived and health put at risk for the almighty dollar. Looks like I will be cleaning out my cabinets and pantry and throwing a lot of things out. Have a wonderful and healthy life everyone!

    Book Wheat Belly is a game changer, as are these books: Grain Brain, Wahls Protocol, and The Big Fat Surprise. The de-monization of animal fats and cholesterol, and the promotion of "healthy" whole grains is killing America with an epidemic of diabetes and untold unforeseen consequences to health.

    Share this comment


    Link to comment
    Share on other sites


    Your content will need to be approved by a moderator

    Guest
    You are commenting as a guest. If you have an account, please sign in.
    Add a comment...

    ×   Pasted as rich text.   Paste as plain text instead

      Only 75 emoticons maximum are allowed.

    ×   Your link has been automatically embedded.   Display as a link instead

    ×   Your previous content has been restored.   Clear editor

    ×   You cannot paste images directly. Upload or insert images from URL.


  • Popular Contributors

  • Ads by Google:

  • Who's Online   7 Members, 0 Anonymous, 249 Guests (See full list)

  • Related Articles

    Scott Adams

    Celiac disease (also called coeliac, nontropical sprue, celiac sprue, gluten intolerant enteropathy, or gluten sensitive enteropathy) is a condition in which there is a chronic reaction to certain protein chains, commonly referred to as glutens, found in some cereal grains. This reaction causes destruction of the villi in the small intestine, with resulting malabsorption of nutrients.
    There is clear evidence of a family tendency toward celiac disease. 5-10% of the first-level relatives (parents, children, and siblings) of diagnosed celiacs may develop celiac disease. The disease affects both sexes, and it can begin at any age, from infancy (as soon as cereal grains are introduced) to later life (even though the individual has consumed cereal grains all along). The onset of the disease seems to require two components: genetic predisposition (two specific genetic markers, called HLA sub-factors, are present in well over 90% of all celiacs in America), and some kind of trigger. The trigger may be environmental (as in overexposure to wheat), situational (perhaps severe emotional stress), physical (such as a pregnancy, an operation), or pathological (a viral infection).
    Once thought to be a childhood disease that would be outgrown, recent evidence indicates that it is not uncommon for the symptoms of celiac disease to disappear during late childhood or adolescence, giving the appearance of a cure. Unfortunately, damage still occurs during these years of apparent health, and later in life these celiacs may find they have suffered considerable damage to the small intestine, and have for years deprived themselves of important nutrients.

    Scott Adams
    No. Celiac sprue is not a well-researched disease. Most of what we know about foods that are safe and foods that are not is gathered from anecdotal evidence provided by celiacs themselves. There is a great deal of controversy about what affects celiacs and what doesnt.
    Take, for example, buckwheat. Along with corn and rice, this is one of only three common grains left on the "safe" list for celiacs. However, some celiac societies have put it on the "unsafe" list and there is anecdotal evidence that some individuals react to it as they do to wheat. Yet a well-known specialist in grain research points out that buckwheat is more closely related to rhubarb than to the toxic grains, so if buckwheat is unsafe then any plant might be unsafe.
    In considering anecdotal evidence for whether a food is safe or not, individuals must make their own choices, but each of us should clearly understand that anecdotal evidence is gathered from individuals with widely varied experience.
    It could be that the "buckwheat flour" that a celiac reacted to was actually one of those mixes that combines buckwheat flour with wheat flour. Another possibility is that, since buckwheat and wheat are often grown in the same fields in alternating years, the "pure buckwheat flour" may have been contaminated from the start by wheat grains gathered at harvest. Yet another explanation might be that the buckwheat was milled in a run that was preceded by wheat or any of the other toxic grains, so the flour was contaminated at the mill. Finally, some individuals -- celiacs or not -- may have celiac-like reactions to buckwheat; they are allergic. Celiacs who are allergic to buckwheat may be easily fooled into believing they are having a gluten reaction. Or, it could be that some evolutionary trick has put a toxic peptide chain into buckwheat despite its distant relation to the other grains, but the odds against this happening are long.
    As individual celiacs learn to live gluten-free, they must gauge their own reactions to foods, do lots of research, ask questions, and try to understand the many variables that may affect the ingredients in their food.
    The following is a list of ingredients which some celiacs believe are harmful, others feel are safe:
    Alcohol Grain alcohol Grain vinegars White vinegar Vanilla extract and other flavorings (may contain alcohol) Amaranth Millet Buckwheat Quinoa Teff   Wheat starch is used in the some countries gluten-free diet because of the belief that it contains only a trace or no gluten and that good baked products cannot be made without it. In a laboratory, wheat starch purity can be easily controlled, but in most plants this is not always the case. Wheat starch is not considered safe for celiacs in these countries: United States, Canada, Italy.
    For more information on this topic visit our Safe & Forbidden Lists.

    Scott Adams
    Vijay Kumar, M.D., Research Associate Professor at the University of Buffalo and President and Director of IMMCO Diagnostics: Convincing the doctor initially depends upon the patient. However, the laboratory to which the test is sent should be available to answer questions the doctor may have. Our laboratory always encourages such questions.
    Karoly Horvath, M.D., Ph.D., Associate Professor of Pediatrics; Director, Peds GI & Nutrition Laboratory; University of Maryland at Baltimore: Lot of physicians in the USA did not get appropriate training to recognize the protean manifestations of celiac disease. However, if the classical symptoms are present--chronic diarrhea, weight loss, protuberant abdomen, foul-smelling stools, etc.--it is absolutely indicated to test the patients serum for antigliadin and antiendomysium antibodies.
    Professionals participating in this discussion group are educating physicians on an almost daily basis. Generally, it is useful to supply the physician with a review article or a textbook chapter describing the values of serological tests and protean manifestations of celiac disease. If that does not help, you can ask the help of professionals participating in the Cel-Pro list. They have helped several patients by calling physicians and convincing them about the necessity of serological testing.

    Scott Adams
    Vijay Kumar, M.D., Research Associate Professor at the University of Buffalo and President and Director of IMMCO Diagnostics: The biopsy may be inconclusive. Serum, if tested for gliadin, endomysial and reticulin antibodies, should provide unequivocal information. Ours and other studies have provided a strong reliability of the serum tests.
    Karoly Horvath, M.D., Ph.D., Associate Professor of Pediatrics; Director, Peds GI & Nutrition Laboratory; University of Maryland at Baltimore: The biopsy may be inconclusive in a small percentage of patients with so-called patchy lesions in the duodenum. It means that there are histologically normal looking spots with finger like villi and pathologic spots showing flattened mucosa in the upper half of the duodenum. If celiac disease is suspected, the gastroenterologist should obtain several biopsies from different spots of the whole duodenum. Most of the endoscopists routinely examine only the upper half of the duodenum (duodenal bulb and the descending part). The transverse segment of the duodenum is not viewed routinely. Few endoscopic centers have an enteroscope, which is a longer and more flexible endoscope for examining the entire duodenum and jejunum. The enteroscopy allows you to obtain biopsies even from the jejunum. The histological examination of a single biopsy specimen may increases the risk of false negative diagnosis.
    The experience of the pathologist in the interpretation of small intestinal histology is important. In centers specializing in celiac disease the gastroenterologist routinely reviews the histologic slides together with the pathologist. There is still a possibility of inconclusive results if multiple biopsies are obtained and the histological interpretation is appropriate. All disease has a developmental process. It means that it takes time for the pathological changes to be evident. There are cases when the symptoms suggest celiac disease, however, the histology is not conclusive. This problem occurs in only a few cases. A repeated biopsy may be necessary after a period of higher gluten intake. However, if the antiendomysium antibody test is positive and the histology is not conclusive a gluten-free diet is recommended.
    The serology test may be inconclusive if:
    The sample handling and shipping is inappropriate; e.g. the serum was shipped at room temperature for days The patient has IgA deficiency, which occurs in one out of 600 people in the general population and much more frequently in patients with celiac disease. In these cases the antigliadin IgA and the antiendomysium IgA tests give negative results. If the tests are performed in a laboratory specialized in celiac serological tests, the laboratory recommends a test for immunoglobulins. If a patient has IgA deficiency and positive antigliadin IgG test, he/she should undergo further absorptive tests and/or an intestinal biopsy.

  • Recent Articles

    Jefferson Adams
    Celiac.com 05/26/2018 - If you haven’t tried a savory pancake, then you’ve been missing out. In many places in the world, savory pancakes are more common than the sweet pancakes. They make a great lunch or dinner twist. This gluten-free version combines scallions and peas, but feel free to add or subtract veggies at will. Serve pancakes them warm with butter for a delicious twist on lunch or dinner.
    Ingredients:
    3 large eggs 1 cup cottage cheese ½ stick salted butter, melted ¼ cup all-purpose gluten-free flour 2 tablespoons vegetable oil plus more for skillet 1 cup shelled fresh or frozen peas, thawed 4 scallions, thinly sliced, plus more for serving 1 teaspoon kosher salt plus more, as desired Directions:
    If using fresh peas, blanch the peas about 3 minutes in a small saucepan of boiling salted water until tender, about 3 minutes (don’t cook frozen peas). Drain well.
    In a blender, add eggs, cottage cheese, flour, 2 tablespoons oil, and 1 teaspoon salt, and purée until smooth. 
    Transfer batter to a medium bowl and stir in peas and scallions. 
    Batter should be thick but pourable; stir in water by tablespoonfuls if too thick.
    Heat a lightly oiled large nonstick skillet over medium heat. 
    Working in batches, add batter to skillet by ¼-cupfuls to form 3-inch-4-inch rounds. 
    Cook pancakes about 3 minutes, until bubbles form on top. 
    Flip and cook until pancakes are browned on bottom and the centers are just cooked through, about 2 minutes longer.
    Serve pancakes drizzled with butter and topped with scallions.
    Inspired by bonappetit.com.

    Jefferson Adams
    Celiac.com 05/25/2018 - People with celiac disease need to follow a lifelong gluten-free diet. However, once their guts have healed, they can still be sensitive to gluten. Sometimes even more sensitive than they were before they went gluten-free. Accidental ingestion of gluten can trigger symptoms in celiac patients, such as pain in the gut and diarrhea, and can also cause intestinal damage. 
    A new drug being developed by a company called Amgen eases the effects of people with celiac disease on a gluten-free diet. Researchers working on the drug have announced that their proof-of-concept study shows AMG 714, an anti-IL-15 monoclonal antibody, potentially protects celiac patients from inadvertent gluten exposure by blocking interleukin 15, an important mediator of celiac disease, and leads to fewer symptoms following gluten exposure.
    The drug is intended for people with celiac disease who are following a gluten-free diet, and is designed to protect against modest gluten contamination, not to permit consumption of large amounts of gluten, like bread or pasta.
    AMG 714 is not designed for celiac patients to eat gluten at will, but for small, incidental contamination. Francisco Leon, MD, PhD, study director and consultant for Amgen, says that their team is looking at AMG 714 “for its potential to protect against modest contamination, not deliberately eating large amounts of gluten, like bread or pasta.” 
    Amgen hopes that AMG 714 will help celiac patients on a gluten-free diet to experience fewer or less sever gluten-triggered events.
    Findings of the team’s first phase 2 study of a biologic immune modulator in celiac disease will be presented at the upcoming Digestive Disease Week 2018. 
    Read more at ScienceDaily.com

    Jefferson Adams
    Celiac.com 05/24/2018 - England is facing some hard questions about gluten-free food prescriptions for people with celiac disease. Under England’s National Health Plan, people with celiac disease are eligible for gluten-free foods as part of their medical treatment. 
    The latest research shows that prescription practice for gluten-free foods varies widely, and often seems independent of medical factors. This news has put those prescribing practices under scrutiny.
    "Gluten free prescribing is clearly in a state of flux at the moment, with an apparent rapid reduction in prescribing nationally," say the researchers. Their data analysis revealed that after a steady increase in prescriptions between 1998 and 2010, the prescription rate for gluten free foods has both fallen, and become more variable, in recent years. Not only is there tremendous variation in gluten free prescribing, say the researchers, “this variation appears to exist largely without good reason…”
    Worse still, the research showed that those living in the most deprived areas of the country are the least likely to be prescribed gluten-free products, possibly due to a lower rate of celiac diagnosis in disadvantaged groups, say the researchers.
    But following a public consultation, the government decided earlier this year to restrict the range of gluten free products rather than banning them outright. As research data pile up and gluten-free food becomes cheaper and more ubiquitous, look for more changes to England’s gluten-free prescription program to follow. 
    Read more about this research in the online journal BMJ Open.

    Jefferson Adams
    Celiac.com 05/23/2018 - Yes, we at Celiac.com realize that rye bread is not gluten-free, and is not suitable for consumption by people with celiac disease!  That is also true of rye bread that is low in FODMAPs.
    FODMAPs are Fermentable Oligosaccharides, Disaccharides, Monosaccharides and Polyols. FODMAPS are molecules found in food, and can be poorly absorbed by some people. Poor FODMAP absorption can cause celiac-like symptoms in some people. FODMAPs have recently emerged as possible culprits in both celiac disease and in irritable bowel syndrome.
    In an effort to determine what, if any, irritable bowel symptoms may triggered by FODMAPs, a team of researchers recently set out to compare the effects of regular vs low-FODMAP rye bread on irritable bowel syndrome (IBS) symptoms and to study gastrointestinal conditions with SmartPill.
    A team of researchers compared low-FODMAP rye bread with regular rye bread in patients irritable bowel syndrome, to see if rye bread low FODMAPs would reduce hydrogen excretion, lower intraluminal pressure, raise colonic pH, improve transit times, and reduce IBS symptoms compared to regular rye bread. The research team included Laura Pirkola, Reijo Laatikainen, Jussi Loponen, Sanna-Maria Hongisto, Markku Hillilä, Anu Nuora, Baoru Yang, Kaisa M Linderborg, and Riitta Freese.
    They are variously affiliated with the Clinic of Gastroenterology; the Division of Nutrition, Department of Food and Environmental Sciences; the Medical Faculty, Pharmacology, Medical Nutrition Physiology, University of Helsinki in Helsinki, Finland; the University of Helsinki and Helsinki University, Hospital Jorvi in Espoo, Finland; with the Food Chemistry and Food Development, Department of Biochemistry, University of Turku inTurku, Finland; and with the Fazer Group/ Fazer Bakeries Ltd in Vantaa, Finland.
    The team wanted to see if rye bread low in FODMAPs would cause reduced hydrogen excretion, lower intraluminal pressure, higher colonic pH, improved transit times, and fewer IBS symptoms than regular rye bread. 
    To do so, they conducted a randomized, double-blind, controlled cross-over meal study. For that study, seven female IBS patients ate study breads at three consecutive meals during one day. The diet was similar for both study periods except for the FODMAP content of the bread consumed during the study day.
    The team used SmartPill, an indigestible motility capsule, to measure intraluminal pH, transit time, and pressure. Their data showed that low-FODMAP rye bread reduced colonic fermentation compared with regular rye bread. They found no differences in pH, pressure, or transit times between the breads. They also found no difference between the two in terms of conditions in the gastrointestinal tract.
    They did note that the gastric residence of SmartPill was slower than expected. SmartPill left the stomach in less than 5 h only once in 14 measurements, and therefore did not follow on par with the rye bread bolus.
    There's been a great deal of interest in FODMAPs and their potential connection to celiac disease and gluten-intolerance. Stay tuned for more information on the role of FODMAPs in celiac disease and/or irritable bowel syndrome.
    Source:
    World J Gastroenterol. 2018 Mar 21; 24(11): 1259–1268.doi:  10.3748/wjg.v24.i11.1259

    Jefferson Adams
    Celiac.com 05/22/2018 - Proteins are the building blocks of life. If scientists can figure out how to create and grow new proteins, they can create new treatments and cures to a multitude of medical, biological and even environmental conditions.
    For a couple of decades now, scientists have been searching for a biological Rosetta stone that would allow them to engineer proteins with precision, but the problem has remained dauntingly complex.  Researchers had a pretty good understanding of the very simple way that the linear chemical code carried by strands of DNA translates into strings of amino acids in proteins. 
    But, one of the main problems in protein engineering has to do with the way proteins fold into their various three-dimensional structures. Until recently, no one has been able to decipher the rules that will predict how proteins fold into those three-dimensional structures.  So even if researchers were somehow able to design a protein with the right shape for a given job, they wouldn’t know how to go about making it from protein’s building blocks, the amino acids.
    But now, scientists like William DeGrado, a chemist at the University of California, San Francisco, and David Baker, director for the Institute for Protein Design at the University of Washington, say that designing proteins will become at least as important as manipulating DNA has been in the past couple of decades.
    After making slow, but incremental progress over the years, scientists have improved their ability to decipher the complex language of protein shapes. Among other things, they’ve gained a better understanding of how then the laws of physics cause the proteins to snap into folded origami-like structures based on the ways amino acids are attracted or repelled by others many places down the chain.
    It is this new ability to decipher the complex language of protein shapes that has fueled their progress. UCSF’s DeGrado is using these new breakthroughs to search for new medicines that will be more stable, both on the shelf and in the body. He is also looking for new ways to treat Alzheimer’s disease and similar neurological conditions, which result when brain proteins fold incorrectly and create toxic deposits.
    Meanwhile, Baker’s is working on a single vaccine that would protect against all strains of the influenza virus, along with a method for breaking down the gluten proteins in wheat, which could help to generate new treatments for people with celiac disease. 
    With new computing power, look for progress on the understanding, design, and construction of brain proteins. As understanding, design and construction improve, look for brain proteins to play a major role in disease research and treatment. This is all great news for people looking to improve our understanding and treatment of celiac disease.
    Source:
    Bloomberg.com