Digest Check-up : Gut Health Blood Test with Nutritionist in Zurich & Geneva

Do you feel like your gut is running the show? Bloating after every meal, unpredictable digestion, low mood or anxiety, chronic skin flare-ups, or recurring sinusitis that no one seems to be able to explain. These are not just inconveniences. They are signals. Your body is telling you something deeper is off, and the answer is almost always measurable through a targeted blood test and microbiome analysis.

Our Digest Check-up is a comprehensive gut health blood test combined with a microbiome analysis and personalized nutritional guidance, designed to identify whether your symptoms stem from dysbiosis, food sensitivities, nutrient malabsorption, or low-grade inflammation. Developed in partnership with Elodie Brocas, nutritionist in Zurich at The Good Life Specialist, this nutrition blood test is available at our clinics in Zurich and Geneva, with no prescription needed.

Understanding the gut and why standard tests miss the full picture

Most people with digestive issues have been told their results are within normal range. But conventional blood tests are not designed to look at gut health specifically. They check the obvious, and miss the subtle. Chronic bloating, food sensitivities, abdominal pain, constipation or diarrhea, excess gaz, and inflammatory skin conditions all have measurable biological roots. The Digest Check-up has been designed to find the root cause of your daily imconfort .

Your gut is directly connected to your immune function, your skin, your mood, and your energy levels. When something goes wrong in the gut, the consequences are felt throughout the entire body. A targeted gut health blood test combined with a food sensitivity assessment gives you and your nutritionist the precise data needed to act, not just observe

What does our digest Check-up examine?

1. Thyroid function (TSH, Free T3 & Free T4) 

   An underactive thyroid slows every digestive process in the body, causing constipation, bloating, and sluggish bowel movements that no amount of dietary adjustment will fix. Thyroid dysfunction is one of the most frequently overlooked causes of chronic digestive discomfort, and it is invisible without a blood test.

2. Vitamins D & A

   Both vitamins play a critical role in maintaining the integrity of the gut lining and regulating immune responses. A deficiency in either weakens the intestinal barrier, a condition sometimes called leaky gut, which allows inflammatory molecules to enter the bloodstream and trigger reactions far from the gut itself, including skin conditions and recurrent infections.

3. Iron & Ferritin

   Iron deficiency is closely linked to digestive dysfunction. Poor iron absorption often signals a problem in the small intestine specifically, and it frequently accompanies conditions involving gut inflammation or impaired nutrient uptake. Low ferritin, even when iron levels appear normal, is a sensitive early warning sign.

4. Zinc

   Zinc is essential for the continuous repair and regeneration of the intestinal lining. Low zinc levels are found consistently in people with chronic digestive complaints, reflux, food sensitivities, and recurring skin conditions such as acne and eczema. It is rarely tested in a standard blood panel.

5. Liver function (ASAT, ALAT, GGT)

   The liver produces bile, which is essential for fat digestion and the absorption of fat-soluble vitamins. Impaired liver function disrupts this process, causing bloating, heaviness after meals, and fat malabsorption. Liver enzyme levels are sensitive early indicators of metabolic stress linked directly to gut function.

6. HbA1c

   Chronically elevated blood sugar disrupts gut motility and the balance of intestinal bacteria. A diet high in refined carbohydrates is one of the primary drivers of dysbiosis, the imbalance of gut bacteria that causes many of the symptoms associated with irritable bowel syndrome and food sensitivities. HbA1c provides a reliable 3-month average of your blood glucose levels.

7. Vitamin B12 (Holotranscobalamin, active form)

   Most labs measure total B12, which includes both active and inactive forms. Holotranscobalamin measures only the active, bioavailable form, making it a significantly more sensitive early indicator of deficiency. B12 is essential for the health of the intestinal mucosa and the nervous system that governs gut motility. Deficiency can cause symptoms that closely mimic irritable bowel syndrome, including bloating, irregular transit, and abdominal discomfort.

8. High-sensitivity CRP (hsCRP)

   Standard CRP is designed to detect acute infection or injury. High-sensitivity CRP is a different measurement entirely. It detects low-grade, silent chronic inflammation. It is one of the most clinically valuable markers in the Digest Check-up.

9. Microbiome analysis

   Beyond the blood test, our microbiome analysis maps the diversity and balance of your gut bacteria, identifying dysbiosis, bacterial overgrowth, or deficiencies in key bacterial strains that directly affect digestion, immunity, and even mental health. The gut microbiome is increasingly described by researchers as a second brain. When it is out of balance, the effects are felt everywhere.