Mechanism behind gluten/casein’s ill effects
Gluten and casein have a very similar structure, and both of them break down into opiate-like substances, which in normal circumstances are then broken down further. If this further breakdown does not occur, the opioids may leak into the bloodstream.
Gluten accounts for about 80% of the protein in certain grains, and casein makes about 80% of the protein in milk. Gluten is actually a combination of two proteins, gliadin and glutenin.
In the course of digestion, glutenin breaks down into gluten exorphins, gliadin into gliadorphin, also called gluteomorphin, and casein into casomorphin aka caseomorphin. In the normal course of events, these would break down further into amino acids. It’s hypothesized that in certain individuals this final step in the digestive process does not occur, or is incomplete.
Gliadorphin, gluten exorphins and casomorphin are all opioid peptides – “which mimic the effect of opiates in the brain[1]“. The brain contains opioid receptors, currently three are recognised, called delta (OP1), kappa (OP2) and mu (OP3). OP1 and OP3 are thought to be the basis for physical dependence. All of them have analgesic effects when activated, OP1 has antidepressant effects, OP2 is sedative and OP3 can cause euphoria[2].
There is a great deal of anecdotal evidence that excluding gluten and casein from the diet produces symptoms very similar to withdrawal from drugs, which makes sense in light of the chemistry involved if the hypothesis [that gluten and casein are not correctly digested, resulting in opioid peptides being released into the bloodstream] is correct.
Since these peptides are produced in the intestine, there is a question as to how they get into the bloodstream, rather than being excreted. Some have proposed a controversial diagnosis, Leaky Gut Syndrome, but there is little support for this in the conventional medical sector. However, this should not be taken to mean that it does not exist, as many ideas which were strongly disputed by conventional medicine a few years ago have now become mainstream.
Further Reading
Research shows autistic symptoms improve on a gluten and casein free diet
Who needs a gluten free, dairy free diet?
Drugs used to treat autism
Gluten and dairy free recipe book


Comments made on the knol site
All drugs should be monitored with extreme care
The efficacy of psycho-active drugs such as Naltrexone (even in low doses) tends to change over time. In particular when used with young people, whose bodies undergo massive changes over a short period in the course of growing up, it’s important to keep in mind that the dosage may need to be changed up or down, or the drug stopped altogether if unacceptable side effects start to take place.
Having said that, if Naltrexone in low doses does help, that is good news for many parents, I’m sure. I still recommend sticking to a casein and gluten free diet, as this appears to be helpful with or without drugs.
Frann Leach – 11 Jan 2011
Low Dose Naltrexone Great treatment, but not stand alone…
Hi,
The lower dose Naltrexone (3.0 – 4.5) depending on age and weight has proven to be very helpful to children with Autism. The woman who supports this in research & has written a book about using LDN with a cassien/gluten free diet is Jaquelyn McCandless, MD. She also recommends sugar free as well.
LDN is not a stand alone treatment. It helps put the immune system back into balance. However, her book – Children with Starving Brains: A Medical Treatment Guide for Autism Spectrum Disorder, Fourth Edition, details all of these treatment alternatives and has had good results. She continues with her research.
I would recommend looking into it if you have a child with Autism. There is a yahoo groups forum if you want to check it out – Autism_LDN@yahoogroups.com. She is very helpful to families with autism issues and has had fantastic results.
If you buy her book from her website, she has a group where she answers questions for parents. For FREE!! You have to buy the book from her though, not from amazon or anywhere else.
Best wishes to those who are on this path. The LDN has made a HUGE difference for me and I will take it forever.
Marygrace Coneff – 23 Dec 2010