Also called: Blood sugar test, Glucose test, Blood glucose test
Report
{context.blood_test.parameters} Parameters
What it checks
Report delivery
Test for
Age group
Commonly advised for
Understanding the FBS + PLBS Test
The Glucose (FBS + PLBS) Profile is a comprehensive diagnostic panel that measures the concentration of glucose in the bloodstream at two critical time points. This combination test is essential for evaluating how the body manages blood sugar levels, providing crucial information for the diagnosis, monitoring, and effective management of diabetes mellitus and prediabetes.
The profile consists of two distinct measurements:
FBS (Fasting Blood Sugar): Taken after 8 to 12 hours of not eating. It reflects the body's basal ability to regulate glucose when food intake is absent.
PLBS (Post-Lunch Blood Sugar) or PPBS (Post-Prandial Blood Sugar): Taken precisely two hours after the patient consumes a standard meal. It indicates how effectively the body uses insulin to manage the surge of glucose following digestion.
Why is This Test Performed?
The Glucose FBS + PLBS Profile is primarily ordered for the following reasons:
Diagnosis of Diabetes Mellitus and Prediabetes: Elevated blood sugar levels in either the fasting or post-meal state are strong indicators of impaired glucose tolerance.
Monitoring Diabetes Management: Helps determine if current treatment plans (diet, exercise, and medication) are effectively maintaining blood sugar within the target range.
Screening for High-Risk Individuals: Routinely recommended for individuals with risk factors such as obesity, a family history of diabetes, or high blood pressure.
Preparation for the Test
Accurate results rely heavily on strict adherence to preparation guidelines:
For the FBS (Fasting Blood Sugar) Component:
Fasting: The patient must fast completely for at least 8 hours, and no more than 12 hours, before the first blood sample is drawn.
Medications: Consult your doctor regarding the timing of diabetes medications or insulin doses.
For the PLBS (Post-Lunch Blood Sugar) Component:
Meal Consumption: Immediately after the sample is collected, the patient will eat a normal, standardized meal.
Timing: The second blood sample must be drawn precisely 2 hours after the start of the meal.
Activity: During the 2-hour interval, the patient should rest and avoid physical activity.
Understanding the Results
Prediabetes: Results in the impaired glucose tolerance range suggest a heightened risk of developing type 2 diabetes, requiring lifestyle interventions.
Diabetes Mellitus: Results consistently in the diabetic range typically confirm a diagnosis, requiring follow-up management by a healthcare professional.
What Factors Can Affect The Results?
Though a reliable test, some circumstances can influence accuracy:
Eating or drinking anything (other than water) before the test
Dehydration or prolonged fasting
Stress or lack of sleep before testing
Certain medications
Sunburn
Coffee intake
Alcohol
Frequently Asked Questions (FAQs)
1. How do I prepare for the test? Do not eat or drink anything except water for 8-12 hours before the test. It is also important to inform your doctor about any medications you are taking, as some of them can affect blood glucose levels and may need to be adjusted or temporarily discontinued before the test.
3. What are the risks associated with an FBS test? The risks associated with an FBS test are generally minimal. However, some people may experience mild pain or discomfort at the site from where the blood sample is taken.
4. What are the risk factors for diabetes? The most common risk factors for diabetes include being obese or overweight with low physical activity, having a family history of diabetes, or having high blood pressure. Other reasons that can cause diabetes include low good cholesterol or high triglyceride levels, polycystic ovarian syndrome, or cardiovascular diseases.
5. Can factors other than hormones and diet affect my blood sugar levels? Yes, blood sugar levels may increase due to certain medications, during pregnancy, and temporarily due to stress.
This pair of tests checks your blood sugar before and after a meal. It is useful if:
Tapadia Diagnostic Centre in Ahmedabad offers NABL-accredited Diabetes Testing (FBS + PLBS) test from a Blood sample(s). Blood sugar test, Glucose test, Blood glucose test is also prescribed for Thirst, frequent urination, shakiness, and fatigue. Established in 1989, this doctor-led diagnostic centre ensures high accuracy. Home sample collection and walk-in facility available at our Ahmedabad center. Pay at the centre with no advance payment. Book online or visit us.
Diabetes Testing (FBS + PLBS) in Ahmedabad
Rated 4.6 on Google
From 6,477 patient reviews across our Hyderabad centres.
Every report, kept for you
Past reports stay in your account and can be downloaded again.
NABL accredited
Every result reviewed by a qualified pathologist before it reaches you.
Four decades of practice
A family-run diagnostic centre, trusted by doctors and households since 1989


Diabetes Testing (FBS + PLBS) in Vijayawada
Diabetes Testing (FBS + PLBS) in Visakhapatnam
Diabetes Testing (FBS + PLBS) in Ahmedabad
Diabetes Testing (FBS + PLBS) in Bengaluru
Diabetes Testing (FBS + PLBS) in Mumbai
Diabetes Testing (FBS + PLBS) in Secunderabad
Diabetes Testing (FBS + PLBS) in Karimnagar
Diabetes Testing (FBS + PLBS) in Hyderabad
Diabetes Testing (FBS + PLBS) in Warangal
Diabetes Testing (FBS + PLBS) in Aurangabad
HIV 1 & 2 Antibodies, Serum-Elisa Method in Ahmedabad
Dengue IgG, IgM Antibodies + NS1 Antigen-Rapid, Serum in Ahmedabad
Lipoprotein A (Lp A), Serum in Ahmedabad
Erythrocyte Sedimentation Rate (ESR) in Ahmedabad
Thyroxine Total (T4), Serum in Ahmedabad
Triiodothyronine Total (T3), Serum in Ahmedabad
CA 19.9 (Pancreatic Cancer Marker), Serum in Ahmedabad
NIPT with Microdeletions in Ahmedabad
NIPT Basic in Ahmedabad
Complete Blood Picture (CBP) in Ahmedabad
Serum Phosphorus Test in Ahmedabad
TIBC in Ahmedabad
Urology Profile in Ahmedabad
Beta HCG Free, Serum (Pregnancy Test) in Ahmedabad
Viral Screening in Ahmedabad
AFP Test in Ahmedabad
Microalbuminuria test in Ahmedabad
Diabetes Testing (FBS + PLBS) in Ahmedabad
Antithrombin III in Ahmedabad
D-dimer test in Ahmedabad
Creatine Kinase (CK) Test in Ahmedabad
AST Test in Ahmedabad
Cardiac Markers in Ahmedabad
Pap Smear - LBC in Ahmedabad
DVT Profile in Ahmedabad
Bleeding Time and Clotting Time (BT & CT) in Ahmedabad
Estradiol Test in Ahmedabad
hs-CRP Test in Ahmedabad
Alkaline Phosphatase (ALP) Test in Ahmedabad
Fertility Profile in Ahmedabad
Albumin blood test in Ahmedabad
Troponin T in Ahmedabad
Infertility Profile Extended in Ahmedabad
Electrolyte Panel in Ahmedabad
Anticardiolipin Antibodies (IgG) in Ahmedabad
PSA Test in Ahmedabad
FSH Test in Ahmedabad
STD Panel in Ahmedabad
PCOS Profile in Ahmedabad
Serum Iron Test in Ahmedabad
Cardiac Profile-III in Ahmedabad
Plasma Fibrinogen Test in Ahmedabad
HBsAg Test in Ahmedabad
Cardiac Biomarker Test in Ahmedabad
Herpes Simplex Virus (HSV) Types 1 and 2 Antibody Test in Ahmedabad
Antenatal Profile in Ahmedabad
Activated Partial Thromboplastin Time in Ahmedabad
Lipid Panel in Ahmedabad
Fine Needle Aspiration Cytology in Ahmedabad
CRP test in Ahmedabad
Joint Pain / SLE / Collagen Profile-I in Ahmedabad
PAPP-A Test in Ahmedabad
Insulin Test in Ahmedabad
Triple Screen Test in Ahmedabad
Anti-HCV Test in Ahmedabad
Basic Metabolic Panel (BMP) in Ahmedabad
Very low-density lipoprotein (VLDL) test in Ahmedabad
Free Testosterone in Ahmedabad
Triglycerides Test in Ahmedabad
Quad Screen in Ahmedabad
Folic Acid in Ahmedabad
Urinalysis in Ahmedabad
CEA Test in Ahmedabad
Ferritin Test in Ahmedabad
Transferrin Saturation% in Ahmedabad
Protein C Antigen in Ahmedabad
Alpha Feto Protein (AFP) - Fluid in Ahmedabad
CPK (MB) Test in Ahmedabad
Lupus Anticoagulant Testing in Ahmedabad
Reticulocyte Count in Ahmedabad
Infertility Profile-Basic in Ahmedabad
Beta hCG Test in Ahmedabad
DIABETIC PROFILE in Ahmedabad
LH Test in Ahmedabad
Anti-Müllerian Hormone (AMH) Test in Ahmedabad
Bile Salts and Bile Pigments, Urine in Ahmedabad
HbA1c in Ahmedabad
Vitamin D (1,25-Dihydroxyvitamin D) in Ahmedabad
Liver Function Test (LFT) in Ahmedabad
Anemia Profile Basic in Ahmedabad
Rheumatoid Factor in Ahmedabad
Widal Test in Ahmedabad
Bilirubin blood test in Ahmedabad
Inhibin A, Tumor Marker, Serum in Ahmedabad
Thyroid Function Tests in Ahmedabad
eGFR in Ahmedabad
Menopause Profile in Ahmedabad
EXTENDED DIABETIC PROFILE in Ahmedabad
LDH Test in Ahmedabad
Total Cholesterol Test in Ahmedabad
Random Blood Sugar Test in Ahmedabad
Total Protein Test in Ahmedabad
RPR test in Ahmedabad
Anti-dsDNA Test in Ahmedabad
HDL Cholesterol in Ahmedabad
Blood Type Test in Ahmedabad
ASO Titre in Ahmedabad
Blood Urea(Serum) Test in Ahmedabad
Postprandial Blood Sugar Test in Ahmedabad
Back Pain Profile in Ahmedabad
ANA test in Ahmedabad
Serum Creatinine Test in Ahmedabad
PT/INR Test in Ahmedabad
Fasting Blood Sugar Test in Ahmedabad
Extended Anemia Profile III Executive in Ahmedabad
Kidney Function Test (Renal Profile) in Ahmedabad
Serum Magnesium Test in Ahmedabad
Well-woman exam in Ahmedabad
LDL cholesterol test in Ahmedabad
Prolactin Test in Ahmedabad
Malaria Blood Smear in Ahmedabad
Liver Function Test (+GGT) in Ahmedabad
TPHA Test in Ahmedabad
Hepatitis B Surface Antigen (HBsAg) Test in Ahmedabad
Antenatal Profile 2 in Ahmedabad
TSH Test in Ahmedabad
Cardiac Catheterization in Ahmedabad
Cardiolipin Antibody (IgM) in Ahmedabad
Master Health Checkup in Ahmedabad
Calcium Profile in Ahmedabad
Coagulation Profile in Ahmedabad
Uric Acid Test in Ahmedabad
Vitamin D (25 - Hydroxy Vitamin D, Serum) in Ahmedabad
Globulin Test in Ahmedabad
Fever Profile Test in Ahmedabad
Connective Tissue Disease Profile in Ahmedabad
Calcium Blood Test in Ahmedabad
IHC in Ahmedabad
Estriol Unconjugated (E3) Test in Ahmedabad
Blood Typing in Ahmedabad
Vitamin B12 Test in Ahmedabad
Serum Cortisol in Ahmedabad
Double Marker Test in Ahmedabad
Pap Smear, Conventional in Ahmedabad
Protein S Activity in Ahmedabad
Non-Invasive Prenatal Testing (NIPT) in Ahmedabad
whole exome sequencing in Ahmedabad
Newborn Screening (NBS) in Ahmedabad
Renal Function Test (RFT) in Ahmedabad