Muscle testing and alternative allergy tests

Applied kinesiology, usually called muscle testing, is presented as a therapy for restoring energy. In practice, what it is mostly used for is telling people what they cannot eat.

That is the useful way to approach the subject, because it puts it alongside a whole family of tests sold for the same purpose — electrodermal and Vega testing, bioresonance, hair analysis, and the respectable-looking blood panels now sold in pharmacies. They work differently, they cost different amounts, and the verdict on all of them is the same.

Why people go, which matters first

Anyone who dismisses these tests without accounting for the demand has not understood the problem.

Allergy and intolerance are badly served. Specialist allergy services in the UK are thin and waits are long. Intolerance, which is not allergy and is not imaginary, falls between specialties and belongs to nobody. And a great many people describe taking a real, repeating, miserable pattern of symptoms to a doctor and being told there was nothing to find — frequently without any test being done, and sometimes with the clear implication that they were imagining it.

Someone who pays for a test after that has not been credulous. They have been persistent about a real problem that nobody would engage with, which is a reasonable thing to be.

It is also worth saying plainly that the person holding the device is often a qualified doctor. These methods are used inside medicine as well as outside it, by registered practitioners who use them alongside conventional practice. So the advice here is not "see a real doctor" — that misses the point entirely, and it insults people who did exactly that. The question is about the method, and a medical qualification behind a device does not make the device work.

What the tests are, and the verdict on them

The British Society for Allergy and Clinical Immunology puts these in a single list — atopy patch tests, IgG antibody tests, the leucocyte cytotoxic test, hair analysis, bioresonance, kinesiology and electrodermal testing including Vega testing — and says of the whole list that they are not valid diagnostic tests for any type of food allergy.

It is worth knowing how each produces its answer, because the answers feel convincing in the room.

Muscle testing. The practitioner has the person hold out an arm and presses on it while a substance is held, placed on the body, or put in a vial nearby. A weaker arm means a problem. The judgement of weakness is made by the person doing the pressing, who knows what is being tested, on a muscle being pressed by that same person. Neither party has to be dishonest for this to go wrong: small unconscious changes in pressure and in effort are enough, and the effect is well described. When the substance is concealed from the tester, the results come out no better than chance.

Electrodermal and Vega testing. A probe measures electrical resistance at a point on the skin while the allergen sits somewhere in the circuit, and the reading is said to change. Skin resistance genuinely does change — with how hard the probe is pressed, with moisture, with sweating, with temperature. In blinded trials, practitioners could not distinguish an allergen from a control, and repeat tests on the same person produced different answers.

Bioresonance works on the same principle with more elaborate equipment.

Hair analysis. A hair is dead keratin. It records some mineral exposure over time and carries no information whatsoever about immune responses to food. Journalists have more than once sent samples from the same head to different laboratories under different names and received different results.

IgG food antibody panels deserve the most attention, because they are the modern version and the one that looks scientific. A blood sample is tested against dozens of foods, and a list comes back of things to avoid.

The flaw is in what IgG means. IgG antibodies to foods are a normal finding in healthy people. They reflect what someone has been eating, not what harms them. A panel will therefore flag the foods a person eats most — wheat, milk, eggs, yeast — which is why the results so often look plausible. It is measuring the diet and handing it back as a diagnosis. The UK and international allergy bodies advise against these tests specifically.

What goes wrong

These are not harmless, and the harms are not hypothetical.

Unnecessary restriction. The characteristic output is a long list — ten, twenty, thirty foods. Removing that much from a diet is difficult, expensive and socially isolating, and in children it risks inadequate nutrition and growth. It can also leave a child with a durable fear of food, which outlasts the diet.

The real diagnosis gets missed. Someone who accepts a list and goes away has stopped looking, and the conditions that actually cause these symptoms are treatable: coeliac disease, lactose intolerance, irritable bowel syndrome, inflammatory bowel disease, a genuine IgE allergy, thyroid disease, and occasionally an eating disorder that a restrictive diet then conceals.

The coeliac trap is the worst of them and it is extremely common. Coeliac testing only works while the person is still eating gluten — the blood test looks for the immune response to it. Anyone who cuts out gluten on the strength of a test result and feels better has made their own diagnosis impossible to confirm, and getting one afterwards means eating gluten again for weeks while feeling ill. Coeliac disease matters: untreated it damages the bowel and causes anaemia and bone disease, and it is lifelong rather than a matter of preference. Get tested before cutting out gluten, not after.

False reassurance. A test that reports no reaction to a food someone is in fact allergic to is more dangerous than no test at all.

The open-ended follow-up. A test that produces a list tends to come with supplements, retests and further appointments, and there is no defined endpoint.

What actually finds an answer

The honest version of this is less tidy than a printout, which is part of why the printout sells.

The history does most of the work. This is not a brush-off — it is what the clinical guidance says, and the single most informative thing anyone can bring to an appointment. What was eaten, how much, how long before symptoms began, how long they lasted, what else was happening, and whether it has repeated. A written diary over a few weeks, with times, beats any test as a starting point.

Two patterns to note, because they point in different directions. True allergy is usually fast — minutes to two hours — reproducible, and involves hives, swelling, vomiting, wheeze or collapse. Intolerance is slower, dose-related, and mostly digestive: bloating, wind, cramps, loose stools. Different mechanism, different tests, different management.

Skin prick tests and specific IgE blood tests are the real tests for allergy — and they have to be read alongside the history, because a positive result in someone with no symptoms means sensitisation, not allergy. These tests over-call, which is why a panel of them ordered without a history generates its own set of unnecessary exclusions.

A supervised oral food challenge is the definitive test, done where a reaction can be treated.

Component-resolved testing helps in difficult cases, distinguishing which protein within a food the immune system is reacting to.

For suspected intolerance, supervised exclusion and reintroduction with a dietitian is the only reliable approach — removing one thing at a time, properly, then putting it back to see whether symptoms return. It is slow and unglamorous, and it is the thing the alternative tests are imitating badly. A referral to a dietitian is a reasonable thing to ask a GP for.

Coeliac serology while still eating gluten, followed by a biopsy if positive. Lactose intolerance is identified by exclusion and reintroduction or a breath test. Contact allergy on the skin is diagnosed by patch testing in a dermatology clinic — a legitimate test which is easily confused with the atopy patch test for foods, which is not.

The complication that explains a lot of cases

There is a real phenomenon that sits precisely in the gap these tests exploit, and it is worth knowing about.

Pollen-food syndrome, also called oral allergy syndrome, is cross-reactivity: the immune system reacting to proteins in certain raw foods because they resemble proteins in a pollen the person is already allergic to. Birch pollen is the commonest UK trigger, cross-reacting with apple, pear, stone fruit, kiwi, hazelnut, almond, walnut, raw carrot, raw celery, raw potato, tomato and peppers. Rye-grass pollen cross-reacts with melon, watermelon, tomato and peanut. Mugwort covers a longer list again.

Symptoms are usually confined to the mouth — itching, burning, tingling, mild swelling of the lips or tongue — and settle within minutes. Severe reactions are uncommon. Because the proteins involved are destroyed by heat, most people tolerate the same food cooked, which is the characteristic clue.

And here is the part that matters most. Standard skin prick and specific IgE tests using commercial food extracts are unreliable for pollen-food syndrome, because the heat-sensitive proteins responsible are often destroyed while the extract is being prepared. Testing with fresh fruit, or a skin prick test for the pollen itself, works better. Diagnosis rests mainly on the history.

So this is a genuine food reaction, in someone with a genuine pollen allergy, which the ordinary tests can miss and which is identified by listening carefully to what somebody eats and when their mouth itches. Anyone turned away because their allergy tests came back clear, who then found that removing certain foods helped, may have been describing exactly this.

Which does not rescue the devices. A practitioner taking a careful history and trying sensible food substitutions can arrive at a real answer with a documented mechanism behind it — and the muscle test or the probe contributed nothing to getting there. The lesson is not that the alternative tests work. It is that the symptoms people bring to them are frequently real, sometimes have a known explanation, and deserve a proper history rather than a dismissal.

Kinesiology as a therapy

Set aside the testing and what remains is pressure, touch, attention and an unhurried hour, which are pleasant and mildly helpful for tense muscles. The claims made for it go considerably further: that energy flows along meridians, that blockage causes physical and mental illness, and that releasing it improves not only health but personal growth and relationships.

Meridians have not been demonstrated as anatomical structures and chi has not been measured. The claims about personal growth and relationships are not the sort of thing that can be tested at all, which is worth noticing rather than arguing with.

Of the tools such practitioners use, acupressure has modest evidence behind it for nausea and is covered separately; aromatherapy is covered under using essential oils safely; nutrition advice is worth having from a registered dietitian; and flower essences are dilute preparations of the same type as homeopathic remedies, discussed under homeopathy.

One phrase in older writing on this subject is worth pulling out, because it appears in the material of many practitioners: that kinesiology "is not a type of medical art that diagnoses illness" and that it is "not within the practitioners' scope to do so." That is a legal disclaimer rather than a description of what happens. The same material goes on to list allergies among the things it treats, and telling somebody which foods are causing their symptoms is a diagnosis whatever it is called.

What to ask for instead

• Keep a diary for two or three weeks — foods, times, symptoms, timings — and take it to the appointment. It is the most useful thing anybody can do, and it is free.
• Ask for the specific tests by name where allergy is suspected: skin prick testing or specific IgE blood tests, and referral to an allergy clinic if the history suggests a real allergy.
• Ask for coeliac testing before removing gluten, not after.
• Ask for a dietitian for suspected intolerance. This is the right professional and the referral is often not offered simply because it is not asked for.
• Mention the pollen. Anyone with hay fever who reacts to raw fruit, nuts or vegetables should say both things in the same sentence, because together they describe a recognised pattern that neither one alone suggests.
• Say so if dismissed. A symptom pattern that is real and repeating and has not been investigated is a reasonable thing to go back about, and a second opinion is a reasonable thing to request.

When it is urgent

• Swelling of the lips, tongue or throat, difficulty breathing, wheeze, a widespread rash or faintness after eating — that is anaphylaxis, and it is 999, adrenaline if prescribed, and lying flat. Never a test to be worked out later.
• Any reaction that has needed medical help before, which warrants an allergy clinic referral and probably an adrenaline auto-injector.
• Weight loss, blood in the stool, difficulty swallowing, persistent vomiting, or anaemia alongside food-related symptoms. These point away from intolerance and need investigating.
• A child on a restricted diet who is not growing as expected, or who has become frightened of food.
• Anyone who has cut out several food groups on the strength of a test and is not better — which is the commonest end point of this route, and the point at which starting again properly is worth the trouble.