Understanding Food Reactions
Food sensitivities — also known as non-allergic food hypersensitivities — are adverse physiological responses to certain foods that do not involve the immune system in the same way as true food allergies. They are caused by enzyme deficiencies, chemical sensitivities, or irritants within the food itself.
Many people experience symptoms repeatedly after eating certain foods — severe migraines, gastrointestinal discomfort, rashes, or fatigue — but the underlying mechanism differs significantly between individuals, making accurate diagnosis essential.
~20% of the population
in industrialised countries is affected by food intolerance — but only a fraction of these are true allergic reactions. Non-immunological reactions are far more common.
Allergy or Food Intolerance?
The distinction lies in how the immune system is involved. Some individuals experience both types simultaneously — making an interdisciplinary diagnostic approach essential.
Food Allergy
Symptoms
- ◆Hives and skin redness
- ◆Swelling of lips/throat
- ◆Wheezing and breathing difficulty
- ◆Vomiting
- ◆Anaphylaxis (life-threatening)
Common Triggers
Children: peanuts, eggs, milk, fish, wheat · Adults: wheat, shrimp, hazelnuts, soy, celery, peanuts
Food Sensitivity / Intolerance
Symptoms
- ◆Bloating and digestive discomfort
- ◆Headaches and migraines
- ◆Fatigue
- ◆Skin rashes or itching
- ◆Diarrhoea
Common Triggers
Lactose, fructose, gluten, histamine, food additives, naturally occurring chemicals
Common Types of Food Intolerance
Non-immunological reactions to food are far more common than true allergies — and each has a distinct mechanism that requires a different diagnostic and therapeutic approach.
Lactose Intolerance
A missing, defective, or down-regulated enzyme leads to inability to absorb lactose. The intestinal flora then ferments the lactose — producing substances that cause typical digestive disorders.
Fructose Intolerance
Impaired absorption of fructose results in unpleasant gastrointestinal reactions including bloating, cramps, and diarrhoea after consuming fructose-containing foods.
Histamine Intolerance
High-histamine foods — aged cheeses, smoked fish, red wine, sparkling wine — trigger pseudo-allergic reactions including rashes, diarrhoea, and migraines in sensitive individuals.
Celiac Disease & Gluten Intolerance
An immune-mediated reaction to gluten that damages the small intestinal lining — distinct from non-coeliac gluten sensitivity, which involves delayed immune and non-immune mechanisms.
Precise Diagnosis. Personalised Treatment.
As specialists for food intolerances and allergies, we focus on differentiating between immunological and non-immunological reactions. Our interdisciplinary team works collaboratively to uncover root causes — through a comprehensive 6-step diagnostic process.
IgE & IgG4 Allergy Testing
Comprehensive blood testing for immediate (IgE-mediated) and delayed (IgG4-mediated) food and inhalatory allergen reactions.
Lymphocyte Transformation Test (LTT)
Cellular sensitisation testing to identify delayed-type hypersensitivity reactions to specific foods and chemical substances.
Intolerance Testing
Oral challenge and blood tests for lactose, fructose, and histamine intolerances — identifying non-immunological triggers.
Food Challenge Procedures
Supervised oral food challenges to confirm or exclude specific food triggers under controlled clinical conditions.
Elimination Diets
Structured removal of suspected trigger foods, followed by systematic reintroduction — to precisely map individual reaction patterns.
Microbiome Analysis
Evaluation of intestinal flora — since an abnormal microbiome can independently process food components and generate intolerance-like reactions.
The 4-Day Personalised Hypoallergenic Rotation Diet
No two patients have the same spectrum of allergies and sensitivities against foods. Only a personalised diet — taking into account all individual reactions — can ensure long-term symptom freedom by strongly reducing inflammatory reactions in the gut, lungs, and on the skin.
Over more than 30 years, our German team developed a personalised hypoallergenic rotation diet that eliminates the incriminated food allergens and offers tolerated foods in a structured 4-day rotation system — preventing the development of new sensitivities.
Day 1
Tolerated foods Group A
Day 2
Tolerated foods Group B
Day 3
Tolerated foods Group C
Day 4
Tolerated foods Group D
"As there are no two patients with the same spectrum of allergies and sensitivities against foods, it is easy to understand that only a personalised diet taking into account the above-mentioned reactions can ensure long-term symptom freedom by strongly reducing inflammatory reactions in the gut, lungs or on the skin."
Prof. Dr. John G. Ionescu — Founder & CEO, German Integrative Medical Center
Scientific References
Find Your Food Triggers — For Good
Our interdisciplinary team will identify exactly what your immune system reacts to — and build a personalised rotation diet and treatment plan to deliver lasting relief.