Your guide to food intolerance testing for greater well-being

Do you often feel inexplicably tired, struggle with bloating or skin problems, even though you generally follow a healthy diet? If so, a food intolerance test could reveal the hidden causes. Often, these are not classic allergies but delayed IgG reactions to foods that are behind such vague symptoms.

When the body suffers quietly: Finding the cause

You can think of your body as a finely tuned orchestra. Every food you eat plays an instrument. But what happens when an instrument suddenly plays a wrong note? Sometimes that note is loud and shrill—a sudden dramatic reaction. Much more often, however, it is quiet and barely audible, yet still disrupts the harmony over time.

This is precisely why so many people suffer from symptoms without knowing the cause. They look for the dramatic reaction but overlook the subtle disturbances that impair their well-being day after day.

Allergy or intolerance? The crucial difference

The dramatic reaction is the classic food allergy. Here, your immune system immediately and intensely raises the alarm by releasing so-called IgE antibodies. Symptoms—from rashes and swelling to shortness of breath—usually appear within minutes. This reaction is clear and can easily be attributed to a specific trigger.

Much more common, however, are the subtle disturbances: delayed food intolerances. In these cases, your body produces IgG antibodies in response to certain food components. The key point is that symptoms do not appear until hours or even up to 72 hours later.

An IgG-mediated reaction is not an allergic emergency, but rather a sign that your immune system is dealing excessively with a particular food. This ongoing stress can lead to chronic, low-grade inflammation, which can manifest in a wide range of symptoms.

This significant time delay makes it nearly impossible to identify the culprit without a targeted food intolerance test. Who would think that Monday’s dinner could be responsible for Wednesday’s headache? You may be wondering how to distinguish between the different types of intolerances. Find out more in our article about the different types of intolerances.

Intolerance vs. allergy at a glance

This table summarizes the key differences to help you better understand your symptoms.

Characteristic	Food intolerance (IgG-mediated)	Food allergy (IgE-mediated)
Response type	Delayed immune response	Immediate immune response
Time course	Hours to 72 hours after consumption	Within minutes to a maximum of 2 hours
Symptoms	Nonspecific: bloating, fatigue, headaches, skin problems	Clear: itching, swelling, rash, shortness of breath, circulatory problems
Antibodies	Immunoglobulin G (IgG)	Immunoglobulin E (IgE)
Severity	Debilitating and chronic, but rarely life-threatening	Can range from mild to life-threatening (anaphylactic shock)

As you can see, the differences are significant. While an allergy is immediately apparent, an intolerance often creeps unnoticed into everyday life.

A widespread problem that many people cannot put into context

If you recognize yourself in these descriptions, you are definitely not alone. Many people sense that something is wrong but cannot put their finger on it. Current data clearly confirms this feeling.

A representative 2021 YouGov study shows that around 21% of adults in Germany are affected by allergies or intolerances to foods such as milk, gluten, or nuts. Interestingly, women, at 62%, reported being affected significantly more often than men. If you would like to read the full study, you can learn more about the study results here on doc-ulm.de.

A blood test that specifically measures IgG antibodies, such as the mybody®x intolerance test, can provide valuable clarity here. It analyzes your individual immune response to a wide range of foods and helps you identify the “silent troublemakers” in your diet. This finally gives you a concrete starting point to take your well-being into your own hands and restore harmony in your body.

What test methods are available and what they really reveal

The search for the right “intolerance test” can quickly feel like an impenetrable jungle. You read about IgG tests, breath tests, or genetic tests everywhere. Don’t worry—we will shed some light on the subject and explain in simple terms which method makes the most sense in each situation.

Think of your immune system as your body’s security team. A classic allergy test (IgE test) looks for the loud “alarm bells”—the IgE antibodies. In the case of a true allergy, they trigger an immediate, often severe reaction. It is like an alarm system that starts shrieking when there is a break-in.

An IgG blood test, such as the mybody®x intolerance test, takes a different approach. It does not listen for the loud alarm but instead detects the “silent observers”: IgG antibodies. An elevated level of these antibodies indicates that your immune system is dealing excessively with a particular food. It is therefore not a sudden alarm, but rather an indication of chronic strain that can lead to the typical delayed symptoms.

The IgG blood test for delayed reactions

The IgG blood test is exactly the right tool if you suffer from vague, chronic symptoms that occur only hours or even days after eating.

• What is measured? The concentration of IgG antibodies against a wide range of foods.
• How does it work? A few drops of blood from your fingertip are all that is needed. The laboratory then analyzes which foods your immune system reacts to particularly strongly.
• When is it useful? For nonspecific symptoms such as constant fatigue, bloating, skin problems, or headaches that you simply cannot attribute to a particular trigger.

An elevated IgG level is not an allergy diagnosis. Think of it instead as your personal guide. It shows you which foods are currently putting stress on your system and where taking a break could help you regain balance.

Breath tests for sugar intolerances

A completely different matter is intolerance to certain types of sugar that your body cannot digest properly. This is where breath tests come in.

• What is measured? The concentration of hydrogen (H2) in your exhaled air after you have drunk a test solution, for example one containing lactose or fructose.
• How does it work? If the sugar is not broken down in the small intestine, it travels on to the large intestine. There, bacteria feed on it and produce hydrogen, which you then exhale through your lungs.
• When is it useful? If lactose intolerance (milk sugar) or fructose malabsorption (fruit sugar) is suspected. These typically cause acute gastrointestinal symptoms shortly after consumption.

While breath tests reveal very specific digestive problems, an IgG test such as the mybody®x intolerance test gives you a much broader view of your immune system’s reactions.

In fact, these complaints are more widespread than many people assume. According to a Statista survey, only 82% of Germans say they have no food intolerances. Conversely, this means that up to 18% of the population struggles with them. And although 14 major allergens have had to be clearly declared since the Food Information Regulation (LMIV) came into force, tests remain a crucial key to uncovering hidden culprits in particular. You can read the figures for yourself in the survey on food intolerances on Statista.de.

This infographic can help you take the first step toward clarifying your symptoms and deciding whether a blood test is right for you.

The decision tree makes it clear: The path to greater clarity begins with carefully observing your symptoms. A blood test can then be the crucial step toward finally having concrete answers in hand and making an informed decision about your health.

The mybody®x at-home test: explained simply and safely

So you’ve decided on an IgG-based intolerance test and are now wondering how the whole process works? Excellent! For many people, the idea of drawing their own blood sounds a little daunting at first. But don’t worry—we’ll show you how straightforward, safe, and virtually painless the mybody®x intolerance test really is from the comfort of your home.

You can safely forget about long waits for doctor’s appointments or complicated procedures. With our test kit, you take matters into your own hands—conveniently, whenever and wherever works best for you.

Your path to clarity in three simple steps

The entire process is designed to be as easy and secure as possible for you. We guide you from ordering to your personal results report. Here’s how it works:

1. Order and receive your test kit: You can conveniently order your test online. Within just a few days, the certified sample collection kit will arrive in your mailbox. It contains everything you need, including easy-to-follow step-by-step instructions.

2. Simple and virtually painless sample collection: Using the enclosed lancets, you collect a few drops of blood from your fingertip. The tiny prick is barely noticeable and is over within seconds. You collect the blood drops on a special dried blood spot card—a clean and straightforward method.

3. Activate and return free of charge: You then activate your test online using your individual test ID. This step is important so that we can later assign your sample to your account anonymously. You then place the sample in the enclosed, prepaid return envelope and send it directly to our laboratory.

Once your sample has arrived at our facility, it takes just a few days for your detailed results report to be available in your secure mybody®x customer account.

Quality and security come first

Especially when it comes to your own health, trust and absolute security are essential. That is why mybody®x makes no compromises.

Your health and data are in the best hands with us. We guarantee the highest standards—from analyzing your sample to protecting your privacy.

Our promise is based on three pillars that set us apart from many other providers:

• Certified specialist laboratory in Germany: Your blood sample is evaluated exclusively in a partner specialist laboratory in Germany certified according to ISO 15189. This guarantees precise and reliable results in line with the highest medical quality standards.
• Stricter data protection: Your personal data is sacred to us. We comply strictly with the GDPR and are additionally certified according to ISO 27001 for information security. Your test results are processed anonymously and are, of course, accessible only to you.
• Personal support and guarantee: We won’t leave you alone with your results. Free coaching with our health experts is included in the price to answer your questions and discuss the next steps. We are so confident in the effectiveness of our recommendations that we even offer you a money-back guarantee.

This ensures that your food intolerance test is more than just a result. It is the starting point for a real improvement in your well-being. If you would like to delve deeper into the subject, also read our detailed article about food intolerance testing. This way, you can take control of your health safely and with confidence.

How to correctly interpret your mybody®x report

It’s finally here: your personal results report from your food intolerance test. In front of you is an informative list of foods, each with its own value. But what do you do with all these numbers and charts now? Don’t worry, you’re in exactly the right place.

We translate the technical jargon for you and show you what the results really mean for your everyday life. Let’s decode together what your body is trying to tell you and what first steps you can take based on it.

What a high IgG level really means

First things first: A high IgG level for a particular food is not an allergy diagnosis. It also does not mean that you have to ban this food from your diet forever. Instead, see it as a valuable signal from your immune system telling you: “Hey, this particular food is keeping me pretty busy right now!”

Think of it like an overflowing email inbox. Most emails (foods) are processed quickly and unnoticed. But some senders (certain foods) send such a flood of messages that your inbox overflows and your entire system becomes stressed. A high IgG level is a sign of exactly this kind of “message flood” that keeps your immune system busy.

Understanding the reaction classes

In your mybody®x report, we have clearly divided the results into different levels. This gives you a quick overview of where you can start.

• No or weak reaction: Everything is in the green with these foods. Your body handles them really well.
• Moderate reaction: There’s more going on here. It may be worth taking a closer look at your consumption of these foods and perhaps eating them a little less often.
• Strong reaction: These foods are currently placing the greatest demands on your immune system. They are the top candidates for a conscious dietary change to give your body a well-deserved break.

This classification is your personal compass. It shows you where you can start to give your system a break and get symptoms such as bloating, constant fatigue, or skin problems under control. If you’d like to explore the science behind IgG reactions in more depth, feel free to read our related article on the blood intolerance test.

Your results are not a final verdict, but the starting point of an exciting journey of discovery into your own body. They give you the tools to take action and actively improve your well-being.

Context is key

Sometimes a high IgG level simply results from eating a food very often. Your immune system is constantly dealing with it and therefore produces more antibodies as a precaution. This doesn’t mean that the food is “bad” for you—it simply means that taking a break or adding more variety to your plate might be a good idea.

That’s why it’s so important to always view the results in the context of your personal eating habits. And that’s exactly where we’ll start now. This isn’t about strict restriction, but about smart adjustments to your diet.

So instead of banning foods forever, you’ll next learn about the principles of an elimination and rotation diet. This is the first, but crucial, step toward turning the insights from your test into noticeable well-being.

Your action plan after the test for noticeable results

You’re holding your test results in your hands—a great first step! But simply knowing is only half the battle. The real change begins now, when you put your mybody®x results into practice. Think of this guide as your personal roadmap for turning the results of your intolerance test into an effective plan for greater well-being.

Based on your individual mybody®x results, we’ll now show you how to adjust your diet strategically. Don’t worry—it’s not about giving up everything forever. Rather, you’re giving your body a deliberate break so it can regenerate and recalibrate.

Phase 1: The elimination diet as a reset for your body

The most important and effective step immediately after the test is the so-called elimination diet. It may sound strict at first, but it really isn’t. Think of it instead as a kind of “reset button” for your gut and immune system.

The principle is very simple: For a manageable period of around four to six weeks, you deliberately avoid the foods for which your test showed a moderate to strong IgG reaction. By removing these potential troublemakers from your diet, you give your overburdened immune system a chance to finally calm down. Chronic inflammation may subside, and your gut can recover.

Many of our customers feel a real difference after just a few days: the troublesome bloated stomach becomes flatter, their energy returns, and even their skin often visibly improves.

It’s important to understand that the elimination phase is not a lifelong sentence. It is a time-limited therapeutic measure. Your goal is to restore balance in your body and establish a healthy foundation for your future diet.

Get creative in the kitchen: Discover alternatives

Avoiding certain foods doesn’t mean your meals will become boring—quite the opposite! See it as an opportunity to try new things and expand your culinary horizons.

• Reacting to cow’s milk? There are fantastic plant-based drinks made from oats, almonds, or coconut. Cheese alternatives made from nuts or seeds are another exciting discovery.
• Reacting to wheat? Explore the world of pseudocereals such as quinoa, buckwheat, and amaranth. Pasta made from lentils or chickpeas is not only delicious but also rich in protein.
• Reacting to chicken eggs? When baking, applesauce, ground flaxseed (as a “flax egg”), or a ripe banana make great substitutes. You can also make a delicious savory “scramble” with chickpea flour or silken tofu.

You’ll be amazed at how many delicious and healthy options there are once you start looking around. Your mybody®x results also include a list of all the foods you don’t react to—use it as inspiration for your next shopping list!

An intolerance that many people do not notice until adulthood is intolerance to dairy products. A study by the Kaufmännische Krankenkasse (KKH) shows that diagnoses of lactose intolerance in Germany have increased significantly in recent years. According to KKH, three times as many women as men are affected, typically complaining of gastrointestinal symptoms because they lack the enzyme lactase. If you would like to learn more about the background, you can find further insights into the study on lactose intolerance at deutschlandfunk.de.

Phase 2: Targeted reintroduction

After the four to six weeks of the elimination phase comes the most exciting part: provocation or reintroduction. Now you play detective and find out which foods actually trigger your symptoms—and, above all, in what quantity you may be able to tolerate them after all.

The plan: Reintroduce the avoided foods one at a time, leaving an interval of two to three days between them. On the test day, eat a normal portion of the food and observe your body very closely over the following 48 to 72 hours.

It is best to keep a small symptom diary. Note how you feel. Have your old symptoms returned? Then you have probably identified the culprit. If everything remains calm, you can move on to the next food. Step by step, you can create your own personal nutrition plan tailored to your tolerances.

Professional support for lasting success

The path to greater well-being is a personal journey, but you do not have to take it alone. The results of an intolerance test are an invaluable tool, but correct interpretation and implementation determine long-term success.

That is precisely why your mybody®x test always includes free coaching with our experienced team of experts. Our coaches help you interpret your results correctly, develop a feasible action plan with you, and support you with practical tips for everyday life. Speaking with your doctor or a nutritionist is also always a good next step toward taking a holistic approach to improving your health and quality of life.

Frequently asked questions about the intolerance test

By now, you have read a great deal about the intolerance test, the different methods, and the right steps to take after receiving your results. Nevertheless, IgG tests continue to raise uncertainties and questions. In this final section, we will clear up the most common doubts.

We want to give you a clear and honest picture so that you can make a safe decision for your health.

Why is the significance of IgG tests debated?

You may also have heard that IgG tests are controversial in the scientific community. That’s true—and the reason is actually quite simple: An elevated IgG level alone is not proof of an intolerance. At first, it only shows that your immune system has come into contact with a food and produced antibodies. That is a completely normal process.

Don’t view the IgG test as a diagnosis on its own, but as an important piece of the puzzle in your search for clues. It is a strong indication of which foods are currently keeping your immune system particularly busy.

And that is precisely where its immense value lies: The test gives you a personal “suspect list” of the main culprits. If you then combine this list with an elimination and challenge diet, as described in the previous chapter, it becomes an incredibly powerful tool. It allows you to find out specifically whether you feel better when you avoid these foods. For thousands of people, this practical approach was the decisive breakthrough.

Do I have to avoid foods that tested positive forever?

No, absolutely not! That is one of the biggest myths surrounding the test for intolerances. The goal is never lifelong, strict avoidance. Rather, it is about giving your body a strategic break for a manageable period of time.

Think of it like a traffic jam in your gut. The elimination diet acts like a temporary road closure, allowing the traffic jam to clear. Once the road is clear again, traffic—that is, the reintroduction of the foods—is slowly and carefully allowed to resume.

• Temporary avoidance: You avoid foods that cause a strong reaction for about 4–6 weeks. This gives your immune system time to calm down.
• Targeted reintroduction: After that, you reintroduce each food individually to test your own personal tolerance threshold.
• Rotation principle: In the long term, rotation can help, where you eat certain foods only every few days. This prevents your immune system from becoming overloaded again.

You’ll see: In many cases, you can later enjoy many of these foods again in moderation without your old symptoms returning. It’s about finding a smart balance, not permanent restriction.

Why doesn’t health insurance cover the test?

IgG tests such as the mybody®x test are generally paid for by the patient, often referred to in Germany as an IGeL service (individual healthcare service). The reason is that, as explained above, their validity has not yet been sufficiently established from a scientific perspective for them to be included in the statutory health insurance benefits catalog. Insurers generally focus on diagnosing acute, IgE-mediated allergies.

However, deciding to invest in your own health is often one of the best decisions you can make. Many people suffer from vague symptoms for years while conventional tests fail to identify a cause.

The cost of an IgG test is an investment in your quality of life. It can save you years of guesswork and show you a direct path to greater well-being by putting you in control of your diet.

For many of our customers, the clarity gained and the noticeable improvement in their symptoms make this investment more than worthwhile.

Does an at-home test replace medical advice?

No, and this is a very important point. A self-test such as the mybody®x intolerance test is not a substitute for a medical diagnosis or treatment. Especially if you have severe or persistent symptoms, you should always consult a doctor first to rule out serious illnesses.

See the test as a first, simple, and discreet step on your journey. It is the perfect complement to medical advice because it provides specific, personal data that you can discuss with your doctor or therapist.

• You gain clarity: The test provides initial indications and a clear direction for further investigation.
• You become an equal partner: With your results, you can ask more targeted questions and develop a plan together with your doctor.
• You take responsibility for your health: You no longer wait passively; you take action yourself. You begin your own journey of discovery and learn to better understand your body’s signals.

The mybody®x test puts you back in control. You go from being affected by your health to actively shaping it and gain the tools to make targeted changes and bring more lasting well-being into your life.

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Are you ready to put an end to guesswork and take the first step toward greater clarity and well-being? At mybody®x, you will find the right test to take your health into your own hands—scientifically grounded and supported by personal guidance.

Discover your mybody®x blood test now and begin your journey toward feeling better in your body.