Stool Examination for Reducing Substances Test: Booking, Price, and Results
About Stool Examination for Reducing Substances Test: Booking, Price, and Results
| Field | Value |
|---|---|
| Also Known As | Stool Reducing Sugars Test, Faecal Reducing Substances Test, Stool Carbohydrate Test |
| Sample Type | Stool sample |
| Fasting Required | No fasting required |
| Report Time | 1 day |
| Recommended For | All ages; especially infants and children with chronic diarrhoea |
| Price | Starting at ₹200 |
What Is a Stool Examination for Reducing Substances Test?
The stool examination for reducing substances test is a simple laboratory test that checks for unabsorbed sugars in a stool sample. When the digestive system cannot properly break down or absorb certain carbohydrates, these sugars pass into the stool unchanged. Doctors commonly prescribe this test for infants, children, or adults who have persistent diarrhoea or suspected carbohydrate malabsorption. It is also referred to as the stool reducing sugars test, faecal reducing substances test, or stool carbohydrate test.
What Does a Stool Examination for Reducing Substances Test Measure?
This test detects the presence and approximate amount of reducing substances in stool. The table below outlines the key parameter measured:
| Parameter | What It Measures |
|---|---|
| Reducing Substances | Detects unabsorbed sugars (including lactose, glucose, fructose, galactose, maltose, and pentose) that have passed through the intestines without being properly digested or absorbed |
Raised levels of these substances help doctors distinguish osmotic diarrhoea, which is caused by unabsorbed sugars drawing water into the intestines, from diarrhoea caused by infections such as viruses or parasites.
Why Is a Stool Examination for Reducing Substances Test Done?
This test is ordered when a patient shows signs of poor carbohydrate absorption. It helps the doctor understand whether diarrhoea is caused by undigested sugars or by other factors such as infections.
Common Symptoms That May Require This Test
The following symptoms are typical reasons a doctor may suggest this test:
- Persistent or chronic watery diarrhoea
- Abdominal bloating and discomfort
- Excessive gas (flatulence)
- Abdominal cramps after eating
- Failure to thrive in infants (poor weight gain or growth)
- Unexplained weight loss
- Loose stools following meals containing dairy or fruit
Conditions This Test Can Help Detect
The stool examination for reducing substances can help identify a range of conditions affecting carbohydrate digestion and absorption:
- Lactose intolerance (inability to digest milk sugar)
- Disaccharidase deficiency, an enzyme deficiency that affects sugar breakdown
- Intestinal monosaccharide malabsorption (poor absorption of simple sugars)
- Coeliac disease causing temporary malabsorption
- Viral gastroenteritis triggering short-term lactase deficiency
- Short bowel syndrome, where the small intestine cannot absorb sufficient nutrients
- Necrotising enterocolitis, a serious intestinal condition seen in premature infants
- Fructose malabsorption
How to Prepare and What to Expect
No complex preparation is needed for the stool examination for reducing substances test procedure. However, following a few simple steps will ensure the sample is collected correctly and gives accurate results.
Do You Need to Fast?
No, fasting is not required before this test. You may eat and drink normally. If your doctor has ordered additional tests alongside this one, check whether those tests have specific dietary requirements.
Practical Tips Before Your Test
Keep the following in mind when preparing to collect your sample:
- Bring a detailed clinical history including your symptoms, previous test results, and any relevant family history, as this is required for the test.
- Use the sterile container provided by the laboratory; do not use any household container.
- Do not collect the sample from a super-absorbent disposable nappy, as it soaks up the liquid and makes the sample unsuitable.
- For infants, line the inside of the nappy with plastic wrap to catch the liquid portion of the stool.
- Keep the sample away from toilet water, urine, and toilet paper, as these can contaminate it.
- Inform your doctor about any medications you are currently taking.
Step-by-Step Procedure
Here is what to expect during the stool examination for reducing substances test procedure:
- Wash your hands thoroughly with soap and water before starting.
- Use the sterile, leak-proof white container provided by the laboratory or collection service.
- Pass the stool into the container, ensuring you capture the liquid or watery portion. Approximately 5 grams (a small amount) is sufficient.
- For infants, place plastic wrap inside the nappy before use, then transfer the collected liquid stool into the sterile container.
- Seal the container securely, then label it with your name, the date, and the time of collection.
- Hand over the sample to the collection agent or transport it directly to the nearest Lupin Diagnostics centre as promptly as possible.
Factors That Can Affect Accuracy
Several factors can affect how reliable the test result is:
- Delayed delivery to the laboratory, as bacteria in stool break down sugars within 2 to 4 hours
- Testing the solid portion of stool instead of the liquid portion
- Contamination with urine or toilet water
- Stool samples that contain barium (from recent imaging tests)
- Samples stored in a preservative or transport medium
- Not refrigerating the sample when delivery is delayed
Understanding Your Stool Examination for Reducing Substances Test Results
Your doctor will review your results in the context of your symptoms, age, and medical history. The table below shows the general reference ranges used for this test:
| Result Category | Level | Interpretation |
|---|---|---|
| Normal (Negative) | Less than 0.25 g/dL | Sugars are being absorbed properly |
| Borderline (Suspicious) | 0.25 to 0.5 g/dL | Possible carbohydrate absorption issue; further evaluation may be needed |
| Abnormal (Positive) | Greater than 0.5 g/dL | Unabsorbed sugars present; may indicate malabsorption |
These ranges are general guidelines. Your doctor will interpret your results based on your age, health history, and other factors. Always consult a qualified healthcare professional for personalised medical advice.
Results During Special Conditions
Some conditions can influence results and require careful interpretation:
- Some healthy newborns aged 5 to 8 days may show elevated reducing substances in their stool due to the high lactose content in breast milk and the natural immaturity of their gut. This is not always abnormal and should be assessed by a doctor alongside other clinical findings.
- Viral gastroenteritis can temporarily reduce the gut's ability to digest lactose, leading to a positive result even in individuals who are not lactose intolerant under normal circumstances.
How to Maintain Healthy Levels
These general tips support good digestive health:
- If carbohydrate intolerance is confirmed, identify and limit the specific foods that trigger symptoms, such as dairy products in the case of lactose intolerance.
- Stay well hydrated, particularly if you have been experiencing diarrhoea.
- Discuss dietary adjustments with your doctor or a registered dietitian before making significant changes to your diet.
Lupin Diagnostics Stool Examination for Reducing Substances Test Price and Home Collection
The stool examination for reducing substances test cost starts at ₹200 at Lupin Diagnostics, with home sample collection available across multiple cities in India. The table below shows indicative prices:
| City | Approximate Price (₹) |
|---|---|
| BHOPAL | 140 |
| CHENNAI | 190 |
| HYDERABAD | 200 |
| KOLKATA | 200 |
| NAVI MUMBAI | 200 |
| PUNE | 200 |
Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
How to Book
Follow these steps for stool examination for reducing substances test online booking:
- Select the test on the Lupin Diagnostics website.
- Choose your city and preferred time slot.
- Opt for home sample collection by a certified phlebotomist, or visit your nearest Lupin Diagnostics centre.
- Receive your report via email or WhatsApp within the stipulated turnaround time.
Home Collection
Stool examination for reducing substances test home collection is available across cities in India. Once collected, samples are processed in NABL-accredited Lupin Diagnostics laboratories by trained professionals. Your digital report is delivered within 24 hours, directly to your email or WhatsApp.
Frequently Asked Questions
This test detects unabsorbed sugars in the stool to help diagnose conditions such as lactose intolerance, disaccharidase deficiency (an enzyme deficiency affecting sugar breakdown), short bowel syndrome, and other causes of carbohydrate malabsorption. It is especially useful in investigating chronic diarrhoea in infants and children.
No, fasting is not required. You can eat and drink normally before collecting the sample. If your doctor has ordered other tests at the same time, check separately whether those require fasting.
Bacteria naturally present in stool begin to break down sugars within 2 to 4 hours of collection. If the sample takes too long to reach the laboratory, this can produce a false-negative result, meaning a problem may be missed. Aim to deliver the sample within one hour, or refrigerate it briefly if there is a short delay.
For infants, do not collect the sample directly from a super-absorbent disposable nappy, as it will soak up the liquid portion needed for testing. Instead, line the inside of the nappy with plastic wrap to catch the stool, then transfer the liquid portion into the sterile container provided by the laboratory.
Yes, some healthy newborns may show elevated reducing substances in their stool. This can happen because breast milk is naturally high in lactose and a newborn's gut is still maturing. A doctor will assess the result alongside the baby's overall health before drawing any conclusions.
A positive result indicates that unabsorbed sugars are present in the stool. This may suggest lactose intolerance, an enzyme deficiency, coeliac disease, viral gastroenteritis causing temporary malabsorption, or another condition affecting sugar absorption. A doctor will interpret the result alongside your symptoms and medical history to decide on the next steps.
No, this test involves no needles or clinical procedures. You simply collect a stool sample at home and deliver it to the laboratory or hand it to a home collection agent. There is no discomfort involved.
Stool Examination for Reducing Substances Test: Booking, Price, and Results
