i-Screen SIBO Check - Glucose + Lactulose
Type
Blood Testing
Biomarkers
8
Duration
30 min
Results
24 hours
Comprehensive breath test to detect small intestinal bacterial overgrowth (SIBO).
Diabetes and metabolic screening tests measure how well your body processes glucose — your primary fuel source. Fasting glucose gives a snapshot of your blood sugar after an overnight fast, while HbA1c reveals your average blood sugar over the past 2–3 months by measuring the percentage of hemoglobin proteins coated with sugar. An insulin test can detect insulin resistance — where your cells stop responding efficiently to insulin — often years before blood sugar levels rise into the diabetic range. This early detection window is critical because prediabetes and insulin resistance are reversible with lifestyle changes, while advanced type 2 diabetes requires lifelong management.
Key Details
Who Is This For?
Adults over 35 as part of routine screening (diabetes affects 1 in 10 adults globally). Anyone with a family history of type 2 diabetes. People who are overweight or physically inactive. Those experiencing increased thirst, frequent urination, unexplained weight loss, or fatigue. Women with a history of gestational diabetes or polycystic ovary syndrome (PCOS).
What's Included
Preparation Required
Fasting for 10–12 hours before your appointment is recommended for accurate results (water is fine). Avoid alcohol for 24 hours and intense exercise for 12 hours before the blood draw. Morning appointments are ideal for consistent hormone and glucose readings. The blood draw typically takes 5–10 minutes.
Biomarkers Tested
8Bacteria in the small intestine produce hydrogen and methane when exposed to glucose. SIBO may be diagnosed with a rise in breath hydrogen of >20ppm in the first 90 minutes.
Bacteria in the small intestine produce hydrogen and methane gas when exposed to glucose. SIBO may be diagnosed with a rise in breath methane of >10ppm above the baseline.
Bacteria in the small intestine produce hydrogen and methane when exposed to glucose. SIBO may be diagnosed with a rise in breath hydrogen of >20ppm in the first 90 minutes.
Bacteria in the small intestine produce hydrogen and methane gas when exposed to lactulose. Methane excretion is indicated by >10ppm sustained rise upon lactulose challenge.
Normal OCTT (the time it takes for lactulose to pass through the gut) in healthy adults is approx 60-120min.
Blood sugar — the body's primary energy source. Fasting glucose screens for diabetes and prediabetes. Chronically elevated glucose damages blood vessels and organs. Levels fluctuate with meals, stress, and physical activity.
Reflects your average blood sugar over the past 2–3 months by measuring the percentage of hemoglobin with attached glucose. HbA1c is the gold standard for diagnosing and monitoring diabetes, unaffected by daily fluctuations.
The hormone produced by the pancreas to regulate blood sugar. Elevated fasting insulin — even with normal glucose — is an early marker of insulin resistance, which precedes type 2 diabetes by years. Key biomarker in longevity medicine.
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- Category
- Diagnostic
- Sample Type
- Blood draw
- Duration
- 30 min
- Results
- 24 hours
i-Screen
i-Screen is an Australian health service offering blood testing and analytics to help individuals understand and monitor their health through personalized online dashboards.
