Jump to content

  • Welcome to Celiac.com!

    You have found your celiac tribe! Join us and ask questions in our forum, share your story, and connect with others.


  • Celiac.com Sponsor (A1):
    Celiac.com Sponsor (A1-M):

  • Get Celiac.com Updates:
    Support Our Content
    eNewsletter
    Donate

Blood Tests......what Is Correct?

bobtom

Recommended Posts

bobtom Rookie
bobtom
Posted

My 11 year old son has been complaining of stomach aches, off and on, for the last 8-10 months. Pediatrician ordered gliadin IGA (deamidated peptide) which came back 67 (<20 normal). Referred to GI and he said that test isn't very reliable and ordered a tTG IGA and total serum IGA (which I am assuming is normal since he had an elevated gliadin to begin with). I was under the impression from what I have been reading that the gliadin test he had done is pretty reliable. Just wondering thoughts on that and is it common to have that test be high and the tTG IGA be low? If so, what would that indicate? This is all very confusing. Thank you!!

Celiac.com Sponsor (A8):
Celiac.com Sponsor (A8):

Celiac.com Sponsor (A8-M):


nvsmom Community Regular
nvsmom
Posted

I think gliadin IgA is considered innaccurate because it has a higher false negative rate than ttg IgA... I think.

I think gliadin IgA indicates celiac. If it has a low specificity (meaning it could test positive for other problems) I would have the GI or pediatrician explain what those possible causes are instead of brushing it off as he he did. :huh:

He sounds like the type of GI that you'll need to see with a list of documented info on the test results to get the doctor on board. Your son is way above normal...what else does he think it is?

Good luck.

GottaSki Mentor
GottaSki
Posted

From what I understand that your son's high DGP IgA indicates Celiac Disease even if the tTG IgA is currently negative.

Here is one journal article that talks about DGP IgA as a useful tool in children because the DGP antibodies may show up before tTG antibodies in blood and is better at monitoring compliance once gluten free.

Open Original Shared Link

It is a small study - used this to illustrate my point. There are other studys with much larger sampling groups that you can find with a simple google search.

Your situation is the exactly the reason doctors should run the ENTIRE Celiac Blood Panel when there are symptoms in children. Looking at one test at a time prolongs an already difficult diagnosis process.

It was correct for your GI to order more Celiac blood tests, but it looks like your still hasn't had an Endomysial IgA or any IgG testing. Did the GI order any nutrient tests? Does he have direct experience with Celiac Disease? This can make a big difference if you decide to proceed with endoscopy/biopsy.

I have the same question as nvsmom - if the GI doesn't think the DGP IgA indicates Celiac Disease, what does he think the test means?

bobtom Rookie
bobtom
Posted
  • Author

Thanks for your replies. He did not order any nutrient tests and he didnt offer any explanation to the high result if it isn't celiac. He pretty much blew off that he thought it could be celiac, but he said we needed to "contend" with the high DGP. He did very briefly mention that if the tTG comes back negative, he may do a biopsy, but he said it so quickly and brushed over it and on to other things. My son had his tTG drawn this weekend, I will let you know what is was. I am very interested to see what it is and where we proceed from there. Can and elevated DGP indicate anything else?? Thanks for your time!

frieze Community Regular
frieze
Posted

My 11 year old son has been complaining of stomach aches, off and on, for the last 8-10 months. Pediatrician ordered gliadin IGA (deamidated peptide) which came back 67 (<20 normal). Referred to GI and he said that test isn't very reliable and ordered a tTG IGA and total serum IGA (which I am assuming is normal since he had an elevated gliadin to begin with). I was under the impression from what I have been reading that the gliadin test he had done is pretty reliable. Just wondering thoughts on that and is it common to have that test be high and the tTG IGA be low? If so, what would that indicate? This is all very confusing. Thank you!!

the IgA version is more sensitive, but less specific, than the IgG version. So they should be ordered together.

GottaSki Mentor
GottaSki
Posted

Can and elevated DGP indicate anything else?? Thanks for your time!

Gliadin is one of two proteins in gluten. Upon digestion proteins are broken down into peptides. A positive DGP IgA shows that antibodies are being created to fight these peptides specific to gluten.

I don't know of anything other than a problem with gluten being the cause of a positive DGP IgA. Anyone else?

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Get Celiac.com Updates:
    Support Celiac.com:
    Join eNewsletter
    Donate
  • Celiac.com Sponsor (A17):
    Celiac.com Sponsor (A17):



    Celiac.com Sponsors (A17-M):



  • Recent Activity

    1. knitty kitty
      - knitty kitty replied to Jane02's topic in Gluten-Free Foods, Products, Shopping & Medications
      9

      Desperately need a vitamin D supplement. I've reacted to most brands I've tried.

      @Jane02, I hear you about the kale and collard greens. I don't do dairy and must eat green leafies, too, to get sufficient calcium. I must be very careful because some calcium supplements are made from ground up crustacean shells. When I was deficient in Vitamin D, I took high doses of Vitamin D to correct the deficiency quickly. This is safe...
    2. Jane02
      - Jane02 replied to Jane02's topic in Gluten-Free Foods, Products, Shopping & Medications
      9

      Desperately need a vitamin D supplement. I've reacted to most brands I've tried.

      Thank you so much @knitty kitty for this insightful information! I would have never considered fractionated coconut oil to be a potential source of GI upset. I will consider all the info you shared. Very interesting about the Thiamine deficiency. I've tracked daily averages of my intake in a nutrition software. The only nutrient I can't consistently...
    3. knitty kitty
      - knitty kitty replied to Jane02's topic in Gluten-Free Foods, Products, Shopping & Medications
      9

      Desperately need a vitamin D supplement. I've reacted to most brands I've tried.

      Hello, @Jane02, I take Naturewise D 3. It contains olive oil. Some Vitamin D supplements, like D Drops, are made with fractionated coconut oil which can cause digestive upsets. Fractionated coconut oil is not the same as coconut oil used for cooking. Fractionated coconut oil has been treated for longer shelf life, so it won't go bad in the...
    4. Scott Adams
      0

      Penobscot Bay, Maine: Nurturing Gluten-Free Wellness Retreat with expert celiac dietitian, Melinda Dennis

      until
      Hello! Join me and treat yourself to a four-day, three-night restorative gluten-free retreat in a peaceful, private coastal retreat setting near Penobscot Bay in Maine. Dates: April 10-13, 2026 Enjoy engaging classes...
    5. Scott Adams
      - Scott Adams replied to Jane02's topic in Gluten-Free Foods, Products, Shopping & Medications
      9

      Desperately need a vitamin D supplement. I've reacted to most brands I've tried.

      I do not know this, but since they are labelled gluten-free, and are not really a product that could easily be contaminated when making them (there would be not flour in the air of such a facility, for example), I don't really see contamination as something to be concerned about for this type of product.
  • Celiac.com Sponsor (A19):

  • Member Statistics

    • Total Members
      133,331
    • Most Online (within 30 mins)
      7,748
    Kristy2026
    Newest Member
    Kristy2026
    Joined
  • Celiac.com Sponsor (A20):
  • Celiac.com Sponsor (A22):

  • Forum Statistics

    • Total Topics
      121.6k
    • Total Posts
      1m
  • Celiac.com Sponsor (A21):

  • Who's Online (See full list)

  • Upcoming Events

  • Posts

    • knitty kitty
      Desperately need a vitamin D supplement. I've reacted to most brands I've tried.

      By knitty kitty · Posted

      @Jane02, I hear you about the kale and collard greens.  I don't do dairy and must eat green leafies, too, to get sufficient calcium.  I must be very careful because some calcium supplements are made from ground up crustacean shells.  When I was deficient in Vitamin D, I took high doses of Vitamin D to correct the deficiency quickly.  This is safe and nontoxic.  Vitamin D level should be above 70 nmol/L.  Lifeguards and indigenous Pacific Islanders typically have levels between 80-100 nmol/L.   Levels lower than this are based on amount needed to prevent disease like rickets and osteomalacia. We need more thiamine when we're physically ill, emotionally and mentally stressed, and if we exercise like an athlete or laborer.  We need more thiamine if we eat a diet high in simple carbohydrates.  For every 500 kcal of carbohydrates, we need 500-1000 mg more of thiamine to process the carbs into energy.  If there's insufficient thiamine the carbs get stored as fat.  Again, recommended levels set for thiamine are based on minimum amounts needed to prevent disease.  This is often not adequate for optimum health, nor sufficient for people with absorption problems such as Celiac disease.  Gluten free processed foods are not enriched with vitamins like their gluten containing counterparts.  Adding a B Complex and additional thiamine improves health for Celiacs.  Thiamine is safe and nontoxic even in high doses.  Thiamine helps the mitochondria in cells to function.  Thiamine interacts with each of the other B vitamins.  They are all water soluble and easily excreted if not needed. Interesting Reading: Clinical trial: B vitamins improve health in patients with coeliac disease living on a gluten-free diet https://pubmed.ncbi.nlm.nih.gov/19154566/ Safety and effectiveness of vitamin D mega-dose: A systematic review https://pubmed.ncbi.nlm.nih.gov/34857184/ High dose dietary vitamin D allocates surplus calories to muscle and growth instead of fat via modulation of myostatin and leptin signaling https://pubmed.ncbi.nlm.nih.gov/38766160/ Safety of High-Dose Vitamin D Supplementation: Secondary Analysis of a Randomized Controlled Trial https://pubmed.ncbi.nlm.nih.gov/31746327/ Vitamins and Celiac Disease: Beyond Vitamin D https://pmc.ncbi.nlm.nih.gov/articles/PMC11857425/ Investigating the therapeutic potential of tryptophan and vitamin A in modulating immune responses in celiac disease: an experimental study https://pubmed.ncbi.nlm.nih.gov/40178602/ Investigating the Impact of Vitamin A and Amino Acids on Immune Responses in Celiac Disease Patients https://pmc.ncbi.nlm.nih.gov/articles/PMC10814138/
    • Jane02
      Desperately need a vitamin D supplement. I've reacted to most brands I've tried.

      By Jane02 · Posted

      Thank you so much @knitty kitty for this insightful information! I would have never considered fractionated coconut oil to be a potential source of GI upset. I will consider all the info you shared. Very interesting about the Thiamine deficiency.  I've tracked daily averages of my intake in a nutrition software. The only nutrient I can't consistently meet from my diet is vitamin D. Calcium is a hit and miss as I rely on vegetables, dark leafy greens as a major source, for my calcium intake. I'm able to meet it when I either eat or juice a bundle of kale or collard greens daily haha. My thiamine intake is roughly 120% of my needs, although I do recognize that I may not be absorbing all of these nutrients consistently with intermittent unintentional exposures to gluten.  My vitamin A intake is roughly 900% (~6400 mcg/d) of my needs as I eat a lot of sweet potato, although since it's plant-derived vitamin A (beta-carotene) apparently it's not likely to cause toxicity.  Thanks again! 
    • knitty kitty
      Desperately need a vitamin D supplement. I've reacted to most brands I've tried.

      By knitty kitty · Posted

      Hello, @Jane02,  I take Naturewise D 3.  It contains olive oil.   Some Vitamin D supplements, like D Drops, are made with fractionated coconut oil which can cause digestive upsets.  Fractionated coconut oil is not the same as coconut oil used for cooking.  Fractionated coconut oil has been treated for longer shelf life, so it won't go bad in the jar, and thus may be irritating to the digestive system. I avoid supplements made with soy because many people with Celiac Disease also react to soy.  Mixed tocopherols, an ingredient in Thornes Vitamin D, may be sourced from soy oil.  Kirkland's has soy on its ingredient list. I avoid things that might contain or be exposed to crustaceans, like Metagenics says on its label.  I have a crustacean/shellfish/fish allergy.  I like Life Extension Bioactive Complete B Complex.  I take additional Thiamine B 1 in the form Benfotiamine which helps the intestines heal, Life Extension MegaBenfotiamine. Thiamine is needed to activate Vitamin D.   Low thiamine can make one feel like they are getting glutened after a meal containing lots of simple carbohydrates like white rice, or processed gluten free foods like cookies and pasta.   It's rare to have a single vitamin deficiency.  The water soluble B Complex vitamins should be supplemented together with additional Thiamine in the form Benfotiamine and Thiamine TTFD (tetrahydrofurfuryl disulfide) to correct subclinical deficiencies that don't show up on blood tests.  These are subclinical deficiencies within organs and tissues.  Blood is a transportation system.  The body will deplete tissues and organs in order to keep a supply of thiamine in the bloodstream going to the brain and heart.   If you're low in Vitamin D, you may well be low in other fat soluble vitamins like Vitamin A and Vitamin K. Have you seen a dietician?
    • Scott Adams
      Desperately need a vitamin D supplement. I've reacted to most brands I've tried.

      By Scott Adams · Posted

      I do not know this, but since they are labelled gluten-free, and are not really a product that could easily be contaminated when making them (there would be not flour in the air of such a facility, for example), I don't really see contamination as something to be concerned about for this type of product. 
    • trents
      Desperately need a vitamin D supplement. I've reacted to most brands I've tried.

      By trents · Posted

      Contact them.
×
×
  • Create New...

Important Information

NOTICE: This site places This site places cookies on your device (Cookie settings). on your device. Continued use is acceptance of our Terms of Use, and Privacy Policy.