By Dr. Alan Kadish
Explanations of dairy reactions:
There are many millions of people who must be cautious about consuming milk
and milk by-products. For this group, there are four principle reasons for their
caution:
Lactose Maldigestion, also known as Lactose Intolerance, or (incorrectly) as lactose allergy.
The digestive system does not produce enough of the lactase enzyme to break down the complex lactose sugar into simpler sugars. The lactose sugar ferments in the small intestine, producing gas, bloating, cramps, and diarrhea.
Note that Lactose Maldigesters usually tolerate lactose in small doses, but are overwhelmed by larger quantities. Also note that it is possible to pre-treat milk with the lactase enzyme and supplement the body's natural lactase enzyme with lactase pills.
Lactose Maldigestion easily can be diagnosed by a test known as the Breath Hydrogen Level test (BHL).
Ingredients to avoid: milk, skim milk, powdered milk, lactic acid.
Milk Allergy: This is a true allergic reaction by the body's immune system to one or more of milk's proteins, such as casein or lactoglobulin. The resulting symptoms typically include swelling, itching, bronchospasm, hives, hypotension or shock, abdominal cramps and diarrhea.
The diagnosis is suggested by positive prick tests to milk or milk component extracts or by RAST tests (not as good as prick tests) or via ELISA method testing. Most clinicians would be convinced by a positive ELISA followed by improvement after avoidance of dairy foods, sometimes adding a single-blind challenge (the doctor or nurse knows whether the patient is getting the real milk or the placebo, but the patient does not). The gold standard for establishing the diagnosis is a double blind placebo controlled challenge, but few clinicians are set up to do this.
Ingredients to avoid: all listed above for Lactose Maldigestion, and casein, sodium caseinate, etc.
Casein Intolerance:
This is when the immune system of the body produces IgA and IgG antibodies to
casein, a milk protein. The community avoiding casein are the people afflicted
with autism. Casein peptides are absorbed through the intestine and collect
in the kidneys. These antibodies can be detected with ELISA serum tests. This
is discussed on the Reichelt page which is referenced in URL list below.
There are some very rare diseases and some conditions that either improve with avoidance of milk and milk by-products or are made worse with milk ingestion.
Some examples are: - Heiner's syndrome (improves with milk avoidance).
- A number of children, with eczema, get worse with milk ingestion.
Villous Atrophy:
This is discussed in the Medline abstracts found in the Educational Institution
section below. For these people the casein milk protein causes the intestinal
villi to flatten, much like it does when gluten is consumed by somebody that
is intolerant to gluten.
For a listing of allergy friendly food sources click here.
Testing Techniques:
Keeping a food diary for a month or more is a very valuable technique for determining if gluten or dairy products are a problem for an individual. The use of lactase pills, as a diagnostic tool, will assist in determining if lactose is the culprit.
There are three methods of allergy testing. Elimination followed by provocation, from blood or via the skin.
The elimination provocation approach is clearly a time intensive, but useful method. One eliminates ALL members of the suspected food family and then after a two week period, very slowly re-introduces them and looks for a response.
A blood sample evaluation can use one of three popular methods, RAST, MAST, or ELISA. These abbreviations represent different chemical methods of determining an immune reaction.
At the Center of Health we use the ELISA method with both the IGG and IGE components. Over the years this has proved to be a more accurate testing method. None of these three is foolproof nor claims to be 100%. For evaluation of gluten intolerance one can check for antibodies to Gliadin a protein derived from gltuen.
Additionally one should be aware of two other related tests, used primarily with autistic youngsters. These test check for caseomorphin and gluteomorphin, which are a combination of casein a milk protein and morphine and gluten and morphine . These are named after their interaction with opiate receptors The third method involves either a scratch of the skin or an interdermal injection (under the skin). The largest drawback to this approach involves the pain and time necessary. The interdermal approach has a number of variations. Different concentrations of the suspected allergin are used. I have found this to be an excellent method for deeming a desensitization dosage.
Obviously the best way to "treat" an allergy is to avoid the offending
substance. For more information regarding the ELISA testing methods click here.
For a listing of allergy friendly food sources, click here.