Gastrin Test: Booking, Price, and Results
About Gastrin Test: Booking, Price, and Results
| Field | Value |
|---|---|
| Also Known As | Serum gastrin test, Fasting gastrin, Gastrin level test |
| Sample Type | Serum (venous blood) |
| Fasting Required | Yes – 12 hours of fasting required; avoid alcohol for 24 hours before the test |
| Report Time | 2 Days |
| Recommended For | Adults of all genders; may be ordered for children if clinically indicated |
| Price | Starting at ₹1,100 |
What is a Gastrin Test?
The gastrin test measures the level of gastrin, a hormone made by specialised cells in the stomach, in your blood. Gastrin controls the production of stomach acid and plays a key role in digestion. Doctors order this test when a patient has recurring stomach ulcers, persistent digestive symptoms, or when a gastrin-producing tumour is suspected. It is also known as the serum gastrin test or fasting gastrin test, and requires a small blood sample drawn from a vein in the arm.
What Does a Gastrin Test Measure?
The gastrin test measures the concentration of gastrin in the blood. The table below explains what gastrin is and why it matters.
| Parameter | What it is | Why it matters |
|---|---|---|
| Fasting Serum Gastrin | A peptide hormone produced by G-cells in the stomach lining | Controls stomach acid secretion and supports digestive function; abnormal levels can signal tumours or other gastric conditions |
Why is a Gastrin Test Done?
A doctor may order a gastrin test for several reasons, from investigating unexplained digestive symptoms to monitoring a known condition. The sections below outline the most common reasons.
Common Symptoms That May Require This Test
The following symptoms may prompt a doctor to request this test:
- Recurrent or persistent stomach pain
- Chronic diarrhoea that does not resolve
- Persistent heartburn or acid reflux
- Unexplained nausea
- Peptic ulcers that keep returning or do not respond to standard treatment
- Unexplained weight loss
Conditions This Test Can Help Detect
This test can help identify a range of gastric and related conditions, including:
- Zollinger-Ellison syndrome, a condition caused by a gastrin-producing tumour that leads to recurrent peptic ulcers and diarrhoea
- Gastrinoma, a type of neuroendocrine tumour found in the pancreas or duodenum (the first section of the small intestine)
- Achlorhydria (absence of stomach acid) and pernicious anaemia, a form of anaemia caused by vitamin B12 deficiency
- Chronic atrophic gastritis (inflammation and thinning of the stomach lining), pyloric obstruction, and Helicobacter pylori infection
- Chronic kidney failure and multiple endocrine neoplasia type 1 (MEN 1), a rare inherited syndrome affecting multiple glands in the body
Gastrin Test for Chronic Disease Monitoring
After a gastrinoma is removed, doctors may use the gastrin test periodically to check for recurrence. Serial measurement of fasting serum gastrin levels, along with imaging, is standard practice for long-term follow-up. Monitoring frequency, often every 6 to 12 months, is guided by the original tumour type, grade, and treatment response.
How to Prepare and What to Expect
Preparing correctly for the gastrin test helps ensure accurate results. Here is what you need to know before your appointment.
Do You Need to Fast?
Yes. You must fast for 12 hours before the test. Plain water is permitted during this period. You should also avoid alcohol for at least 24 hours before the sample is collected.
If your doctor suspects a gastrinoma, you may be asked to stop taking proton pump inhibitors (PPIs such as omeprazole) for two weeks and H2 blockers (such as ranitidine) for at least 72 hours before the test. Discuss any medication changes only with your doctor.
Practical Tips Before Your Test
The following steps will help you prepare effectively:
- Bring a detailed clinical history, including your symptoms, previous test results, and relevant medical records, as this is required for the test
- Inform your doctor about all medications, supplements, vitamins, and over-the-counter medicines you are currently taking
- Avoid coffee and caffeine-containing drinks during the fasting period
- Stop taking high-dose biotin (vitamin B7) supplements at least 72 hours before sample collection, as this can interfere with results
- Wear loose-fitting or half-sleeved clothing for easy access to the arm during blood collection
Step-by-Step Procedure
- A trained phlebotomist (blood collection specialist) will clean the inside of your arm with a disinfectant swab.
- A tourniquet (a soft band) is tied around your upper arm to make the vein easier to locate.
- A fine needle is gently inserted into a vein, usually at the bend of the elbow, to draw a small blood sample (approximately 3 ml).
- The blood is collected into a gel tube, and the needle is removed.
- Light pressure is applied with cotton wool to stop any minor bleeding, and a small bandage is placed over the site.
- The sample is stored in refrigeration and sent to the laboratory for analysis by enzyme immunoassay (EIA).
Factors That Can Affect Accuracy
Several factors may affect the reliability of your results:
- Proton pump inhibitors and H2-blocking agents can significantly raise gastrin levels
- Caffeine and corticosteroids can lower gastrin levels
- Not fasting before the test may give falsely elevated readings
- High-dose biotin supplementation can interfere with the assay
- Alcohol consumed within 24 hours of the test
- Reduced kidney function, as the kidneys help clear gastrin from the body
Understanding Your Gastrin Test Results
Your results should always be reviewed by a qualified doctor, along with your symptoms and medical history. The table below shows general reference ranges.
| Parameter | Normal Range | Unit | Notes |
|---|---|---|---|
| Fasting Serum Gastrin (Adults) | Less than 100 | pg/mL | Levels above 1,000 pg/mL in a patient with gastric or duodenal ulcers may be diagnostic of gastrinoma |
| Fasting Serum Gastrin (Adults, alternative range) | 20 to 100 | pg/mL | Normal ranges may vary slightly between laboratories |
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
Certain situations can shift gastrin values independently of disease. Here is how some common factors affect readings:
- Long-term use of PPIs (such as omeprazole or pantoprazole) frequently raises serum gastrin above the normal range, even in the absence of a tumour.
- Patients with chronic kidney failure also tend to have higher baseline gastrin concentrations because the kidneys help clear gastrin from the bloodstream.
- Gastrin levels generally rise with age, which may reflect a gradual decline in stomach acid production. Medications that slow gut movement, such as opioids, may also affect serum gastrin readings.
How to Maintain Healthy Levels
The following general wellness habits support good digestive health:
- Eat regular, balanced meals and limit foods that trigger acid reflux, such as spicy, fatty, or very acidic foods
- Avoid self-medicating with antacids or acid-suppressing medicines without a doctor's guidance, as prolonged use can affect gastrin levels
- Speak to your doctor promptly if you experience recurring digestive discomfort, as early evaluation supports better outcomes
Lupin Diagnostics Gastrin Test Price and Home Collection
The gastrin test cost at Lupin Diagnostics starts at ₹1,100, with home sample collection. The table below shows indicative prices across major Indian cities.
| City | Approximate Price (₹) |
|---|---|
| BHOPAL | 1100 |
| CHENNAI | 1100 |
| HYDERABAD | 1100 |
| KOLKATA | 1100 |
| NAVI MUMBAI | 1100 |
| PUNE | 1100 |
Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
How to Book
- 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 2 days.
Home Collection
Gastrin test home collection is available across cities through Lupin Diagnostics. A certified phlebotomist will visit your home at a time that suits you to collect the blood sample. All samples are processed in NABL-accredited laboratories, and your report is delivered digitally for convenient access.
Frequently Asked Questions
The gastrin test measures gastrin levels in the blood to evaluate patients with recurrent peptic ulcers or persistent abdominal symptoms. It is primarily used to diagnose Zollinger-Ellison syndrome and gastrinomas, and may also help identify other conditions affecting stomach acid regulation.
You need to fast for 12 hours before the test, avoiding all food and drinks except plain water. Avoid alcohol for 24 hours beforehand. Your doctor may ask you to stop certain stomach medications, such as PPIs, for up to two weeks before the sample is collected. Always follow your doctor's specific instructions.
The test involves a routine blood draw from a vein in your arm. You may feel a brief sting when the needle is inserted, but the procedure takes only a few minutes and causes minimal discomfort. Most people find it straightforward.
Elevated gastrin can indicate gastrinoma, Zollinger-Ellison syndrome, chronic atrophic gastritis, pernicious anaemia, or prolonged use of acid-suppressing medications. Levels above 1,000 pg/mL, along with ulcer symptoms, may indicate a gastrinoma. Your doctor will assess your result in the context of your full clinical picture.
Yes. Antacids, H2 blockers, and PPIs can raise gastrin levels, while caffeine and corticosteroids can lower them. Inform your doctor about all medicines and supplements you are taking so that results can be interpreted accurately.
For patients who have had a gastrinoma removed, repeat testing is recommended as part of long-term monitoring, typically every 6 to 12 months, depending on individual risk factors. For initial diagnosis, frequency depends on the clinical situation and your doctor's judgement.
Yes. You can complete your gastrin test online booking through the Lupin Diagnostics website and choose a home collection slot. A trained phlebotomist will collect your blood sample at home, and the report will be delivered digitally within 2 days.
Gastrin Test: Booking, Price, and Results
