Do you wake up feeling as though you have not rested, often feel bloated, sleep lightly, or experience brain fog, even though every result from your annual health check comes back “normal”? Many people wonder what is causing these symptoms. Routine blood tests are useful for measuring the levels of various substances in the blood, but they do not always show how your cells and gut microorganisms are functioning internally.
The Organic Acids Test is another option for additional testing that gives doctors information to help assess your symptoms and develop a health care plan better suited to you. This article from LINNA Clinic explains what the test is, what it can reveal, who it may be suitable for, and how to prepare.
What Is the Organic Acids Test?
The Organic Acids Test, or OAT, measures various organic acids in urine. These substances are produced through the body’s metabolic processes, such as converting food into energy. Some are also associated with the activity of microorganisms in the gut and are excreted in urine.
The test uses a urine sample, so no blood draw is needed, and multiple substances can be measured from a single sample. Some test panels include more than 70 markers. The number and types of substances measured vary depending on the test panel and laboratory.
Doctors consider the results alongside your symptoms, health history, diet, medications and supplements, as well as other test results, to interpret the findings and develop an appropriate health care plan.
What Can the Organic Acids Test Tell Us?
The results are divided into several categories related to everyday health.
- Gut Microbiome Balance: Looks at signs of the activity of certain groups of yeast and bacteria associated with bloating, abdominal fullness, and irregular bowel movements.
- Cellular Energy: Looks at energy production processes in the mitochondria, which are related to feelings of tiredness and fatigue.
- Vitamins and Minerals: Helps indicate which nutrients your body may need more of.
- Neurotransmitters: Looks at metabolites related to mood, concentration, and sleep.
- Oxidative Stress and Detoxification: Looks at markers related to antioxidants and the body’s ability to eliminate waste.
- Oxalates: Substances associated with certain foods that may be related to joint pain in some people.
These results are markers that help provide an overall picture and identify patterns; they are not a diagnosis of disease.
How Does the Organic Acids Test Differ from Routine Blood Tests?
- Routine Blood Tests: Measure values such as blood sugar, lipids, and markers of liver and kidney function to assess health and identify abnormalities within the parameters tested.
- Organic Acids Test: Measures various organic compounds in urine related to the body’s metabolic processes, some of which are associated with the activity of gut microorganisms, offering insight into internal processes in the body.
The two types of testing provide different information and cannot replace each other. Doctors select tests based on your symptoms and health history.
Key Features of Organic Acids Testing at LINNA
The numbers in a report are useful when someone helps explain what they mean. LINNA Clinic therefore places importance on interpretation by a doctor.
- Laboratories That Meet Quality Standards: Samples are sent to a laboratory that meets quality standards.
- Easy-to-Read Reports: Results are organized into categories and show which areas should be prioritized.
- Individual Interpretation by a Doctor: Your results are reviewed alongside your symptoms, health history, and other test results. You are not simply given a report to interpret on your own.
- A Basis for a Personalized Care Plan: The results provide information to help you plan your health care together with your doctor.
Who Is the Organic Acids Test Suitable For?
- People who experience chronic fatigue or still feel unrefreshed after resting.
- People who frequently experience bloating, abdominal fullness, or irregular bowel habits.
- People who experience brain fog, difficulty concentrating, or poor sleep.
- People whose blood test results are normal but who still have symptoms that affect daily life.
- People who want information to help tailor their diet and supplements more precisely.
- People interested in preventive health care who want a more in-depth assessment.
The Testing Process
- Consult a Doctor for an Initial Assessment: The doctor reviews your symptoms, existing medical conditions, and current medications and supplements to determine whether the test is suitable for you.
- Receive Preparation Instructions and a Collection Kit: The team explains the steps in detail.
- Collect Your First Morning Urine: Collect the sample as instructed. It takes only a short time and does not require a blood draw.
- Send the Sample to the Laboratory: Results generally take approximately 1–2 weeks.
- Receive and Review Your Results with a Doctor: The doctor explains the results and plans the next steps with you.
What Happens After You Receive Your Results?
The results are a starting point, not a final answer. Your doctor considers them alongside your symptoms and lifestyle. Possible approaches include:
- Adjusting your diet and eating habits to suit your body.
- Supporting the balance of your gut microbiome.
- Supplementing vitamins and minerals your body may need.
- Adjusting your sleep, exercise, and stress management.
- Conducting additional tests in some cases and scheduling follow-up appointments to monitor changes.
Preparation and Precautions Before Testing
Instructions may vary slightly between laboratories. Follow the guidance provided by your medical team as your main reference.
- Collect Your First Morning Urine before eating or drinking anything. The urine should be yellow rather than too clear, as it may be too diluted to use.
- Avoid Certain Foods for 48 Hours Before Collection, such as apples, grapes, raisins, pears, and cranberries, as well as certain supplements, such as arabinogalactan, echinacea, reishi mushroom, and ribose (Mosaic Diagnostics, 2026).
- If You Have Just Finished a Course of Antibiotics, wait at least 48 hours before collecting the sample.
- Do Not Stop Medications or Supplements on Your Own without consulting your doctor.
- For Women Who Are Menstruating, some laboratories recommend avoiding sample collection during menstruation. Check with the team beforehand.
Summary
Start caring for your health with information from your own body. Fatigue, digestive problems, and brain fog do not have just one cause, and their causes are not always apparent in blood test results. The Organic Acids Test provides a more detailed perspective on cellular and gut function to help you and your doctor develop a more targeted health care plan.
If you are interested, book a consultation with a doctor at LINNA Clinic by calling 063-609-8888, WhatsApp +66 91-979-9554, or LINE: @linnaclinic.
References
- Kresser Institute. (2020). FM gut pathologies: Organic acids test review.
https://my.kresserinstitute.com/wp-content/uploads/2020/10/FM-Gut-Pathologies-Organic-Acids-Test-Review.pdf - Lee, Y.-T., Huang, S.-Q., Lin, C.-H., Pao, L.-H., & Chiu, C.-H. (2022). Quantification of gut microbiota dysbiosis-related organic acids in human urine using LC-MS/MS. Molecules, 27(16), 5363.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9457824/ - Mosaic Diagnostics. (2026). Urine collection instructions (MDX-INST-URINE 03-2026 v.7).
https://mosaicdx.com/wp-content/uploads/2025/12/MDX-INST-URINE-03-2026-v7.pdf - Rupa Health. (n.d.). Mosaic Diagnostics Organic Acids (OAT).
https://www.rupahealth.com/lab-tests/mosaic-diagnostics-organic-acids-oat
This article has been prepared and reviewed by the LINNA Clinic medical team.
Interested in this program or need personalised advice?
The LINNA Clinic team is ready to help you choose the program that suits you best.
