Lactose intolerance self-test: How to finally get clarity

Many people feel unwell after eating or drinking dairy products. They suspect they have lactose intolerance , but aren't sure. And as long as the cause remains unknown, taking targeted action is difficult.

This article tells you everything you need to know to recognize lactose intolerance . We'll show you the symptoms , provide you with simple self-tests , and explain the difference between lactose intolerance and a milk allergy . We'll also discuss modern methods such as DNA testing for lactose intolerance .

What exactly is lactose intolerance?

Lactose intolerance means that your body cannot digest the milk sugar lactose, or can only digest it to a limited extent. This requires the lactase enzyme , which is produced in the small intestine. If this enzyme is missing, the lactose passes undigested into the large intestine, where it ferments and causes typical symptoms.

What symptoms indicate lactose intolerance?

Lactose intolerance symptoms usually appear 30 minutes to two hours after consuming lactose-containing products. These include:

• Flatulence

• Abdominal pain and cramps

• Diarrhea

• Nausea or vomiting

• Rumbling bowel sounds

Not everyone reacts the same way. Sometimes a small amount of lactose is enough, sometimes those affected can tolerate small amounts without any problems.

What is the difference between a milk allergy and lactose intolerance?

The terms are often confused. In a milk allergy, the immune system reacts to the proteins in milk. Even the smallest amounts can trigger severe reactions such as skin rashes, shortness of breath, or even anaphylaxis.

Lactose intolerance, on the other hand, is a digestive disorder. While unpleasant, it is not life-threatening. Anyone wanting to recognize lactose intolerance should definitely be aware of this difference.

Am I prone to lactose intolerance?

Many cases are genetically determined. Lactose intolerance is particularly widespread in Asia, Africa, and South America. In Europe, however, it is less common. Diseases such as Crohn's disease, celiac disease, or gastrointestinal infections can also trigger secondary lactose intolerance .

Lactose intolerance self-test for home use

1. Replace milk with lactose-free products

Drink only lactose-free milk for two weeks and observe your symptoms. If your condition improves, lactose intolerance is very likely.

2. Test low-lactose cheeses

Many aged cheeses contain very little lactose (e.g., Parmesan, Cheddar, Gouda). If you tolerate these better than fresh cheese or milk, this indicates an intolerance.

3. Take lactase enzyme tablets

Additionally, you can take a lactase enzyme pill before consuming dairy products. If your symptoms improve, that's a clear sign.

Scientific tests to confirm

DNA test for lactose intolerance

A DNA test reveals whether you are genetically predisposed to producing little lactase. While it doesn't prove acute intolerance, it helps in analyzing the underlying causes. Does a DNA test help with lactose intolerance? Yes – especially when combined with other methods.

Hydrogen breath test

You drink a lactose solution, and your breath is regularly tested for hydrogen. A significant increase indicates that your body is not digesting lactose.

Lactose tolerance test

After consuming lactose, your blood sugar level will be measured. If it remains low, this suggests lactose intolerance.

Stool acid test

Especially in young children, lactose digestion is analyzed by measuring the acidity in the stool. This test is less common, but helpful when there is uncertainty.

What to do if you have lactose intolerance.

What to do if you have lactose intolerance after eating? If symptoms occur, it helps to take enzyme tablets or switch to plant-based alternatives. In the long term, a lactose-free diet helps to avoid discomfort.

Many people with lactose intolerance can tolerate small amounts of lactose. Find out what your body tolerates through observation.

Probiotic yogurts can also help, as they improve lactose digestion in the gut. Additionally, pay attention to your calcium intake if you are avoiding dairy products.

Conclusion:

A simple lactose intolerance self-test , observation, and possibly a DNA test can provide clarity. Recognizing your lactose intolerance symptoms allows you to effectively alleviate discomfort and adjust your diet accordingly.

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