Food Intolerances
“Please help, I can’t tolerate any food anymore.”
If you regularly experience bloating, skin reactions, or fatigue after eating, a food intolerance may be the underlying cause. We help you uncover the root causes.
- with evidence-based diagnostics
- individualized guidance
- and sustainable solutions
“A holistic approach to food intolerances is characterized by a detailed medical history, comprehensive diagnostics, and long-term, individualized therapy.”
Dr. Katja Aschenbrenner, M.D.
Are you experiencing
this as well?
Abdominal pain, bloating, diarrhea, or constipation
Headaches, palpitations, fatigue, brain fog
Skin reactions such as redness or itching
If you often find yourself asking, “Why can’t I tolerate anything anymore?” or “What could I have eaten that’s causing this reaction?”, this is a sign that it’s time to take a closer look.
I am Dr.
Katja Aschenbrenner, M.D.
In our practice, you are at the center of care. Together, we explore the question:
Which foods, life circumstances, or stressors could be causing your symptoms?
We do not focus solely on symptoms — we focus on root causes.
Our approach combines classical diagnostics with a comprehensive medical history and, when indicated, specialized tests such as stool, blood, or urine analyses. We emphasize individualized counseling, patience, and long-term support — because every food intolerance and every person is different.
This is how
we work
with you
Initial consultation:
The investigative work begins. Together with you, we investigate foods, lifestyle factors, triggers, and patterns.
Diagnostics:
Depending on clinical suspicion, additional testing may include blood, urine, or stool analyses, as well as elimination and reintroduction diets.
Therapy & guidance:
You keep a food and symptom diary, which we evaluate together. Foods are eliminated step by step and then carefully reintroduced under supervision.
Sustainable change:
Not just avoidance, but long-term tolerance. We focus on gut health, the microbiome, and stress management.
“Stress of any kind has a significant impact on our gut and digestion. This is why food intolerances can worsen during stressful phases of life — or even appear for the first time.”
Dr. Katja Aschenbrenner, M.D.
I understand you,
my personal
story
Personally, I eat according to my Ayurvedic constitution.
In addition, I replace dairy products with plant-based alternatives and pay close attention to sufficient protein and fiber intake.
This is what treatment looks like
step by step
Step 1:
Initial consultation (60–90 minutes)
Step 2:
Documentation (food & symptom diary)
Step 3:
Diagnostics as indicated
Step 4:
Therapy plan & ongoing guidance
Step 5:
Follow-up and long-term care
Addressing common concerns, objections & beliefs
“I only have symptoms occasionally — is it really worth it?”
Yes. Even intermittent symptoms can indicate an intolerance that may lead to long-term problems if left unaddressed.
“Does this mean complete restriction?”
Not necessarily. The goal is not radical avoidance, but targeted adjustments and long-term tolerance.
“Isn’t this a lot of effort?”
Yes, it requires participation — such as keeping a food and symptom diary — and patience.
However, many patients find the effort worthwhile in terms of improved quality of life and health.
Who is this therapy
suitable for?
This approach is suitable for you if:
- You regularly experience symptoms after eating (digestive, skin, headaches, fatigue)
- You suspect certain foods “don’t agree with you”
- You want a holistic, comprehensive evaluation
- You are willing to actively participate (diary, step-by-step process)
- You want to sustainably improve tolerance and overall health
This approach may not be suitable for you if:
- You are looking for an immediate “quick fix” without personal involvement
- You are unwilling to keep a food or symptom diary
- You categorically reject elimination phases or dietary adjustments
What types of food intolerances exist?
In addition to well-known intolerances such as lactose, sorbitol, or fructose intolerance, there are gluten and wheat intolerances, histamine intolerance, mast cell activation syndrome (MCAS), lectin intolerance, and salicylate intolerance.
What is the difference between an allergy and an intolerance?
An allergy triggers an immune response — often immediate and pronounced.
An intolerance results from enzyme deficiencies, gut dysfunction, or impaired food processing. It is usually delayed and more variable in presentation.
Can an intolerance develop suddenly, even if I tolerated everything before?
Yes. Stress, infections, changes in gut flora, hormones, or medications can cause the “bucket to overflow,” leading to new symptoms.
Which tests are truly useful?
Depending on the clinical working diagnosis, we use medical history, stool/blood/urine tests, food diaries, and targeted elimination and reintroduction phases.
How long does it take to notice improvement?
Many patients report first improvements within a few weeks — depending on how long symptoms have been present and how consistently the measures are implemented.
What is the “histamine bucket”?
It describes the body’s capacity to tolerate histamine. When the total load becomes too high (due to diet, stress, hormones), the “bucket overflows” and symptoms occur.
The size and filling level of this “histamine bucket” vary greatly between individuals and depend strongly on life circumstances. This explains why some people react very sensitively to histamine, while others can consume large amounts of histamine rich food such as pickled foods or seafood without any issues.