Decoding Your Blood Test Results
You have just received your blood test results, and the report is filled with abbreviations like CBC, TSH, ALT, and HDL — along with numbers, units, and reference ranges that seem like a foreign language. You are not alone. Most people find their lab reports confusing, and many never fully understand what their results mean.
This guide is designed to change that. We will walk you through the most common blood tests ordered in the UAE, explain what each marker measures, provide normal reference ranges, and help you understand when results might be cause for concern. While this guide is educational, always discuss your specific results with a qualified healthcare provider for personalized medical advice.
Complete Blood Count (CBC): Your Blood's Report Card
The Complete Blood Count is one of the most frequently ordered blood tests worldwide. It provides a comprehensive overview of the three main types of cells in your blood: red blood cells, white blood cells, and platelets.
Red Blood Cells (RBC) and Hemoglobin
Red blood cells carry oxygen from your lungs to every cell in your body. The key markers to watch are:
- Hemoglobin (Hb) — The protein in red blood cells that carries oxygen
- Normal for men: 13.5-17.5 g/dL
- Normal for women: 12.0-16.0 g/dL
- Low hemoglobin may indicate anemia, caused by iron deficiency, vitamin B12 deficiency, chronic disease, or blood loss
- High hemoglobin may indicate dehydration, lung disease, or polycythemia vera
- Hematocrit (Hct) — The percentage of blood volume occupied by red blood cells
- Normal for men: 38.3-48.6%
- Normal for women: 35.5-44.9%
- MCV (Mean Corpuscular Volume) — The average size of your red blood cells
- Normal: 80-100 fL
- Low MCV (microcytic) suggests iron deficiency anemia or thalassemia — common in the UAE population
- High MCV (macrocytic) suggests vitamin B12 or folate deficiency
White Blood Cells (WBC)
White blood cells are your immune system's soldiers. They fight infections, allergens, and abnormal cells.
- Total WBC Count
- Normal: 4,500-11,000 cells/mcL
- High WBC (leukocytosis) may indicate infection, inflammation, stress, or in rare cases, leukemia
- Low WBC (leukopenia) may indicate bone marrow problems, autoimmune conditions, or certain medications
- WBC Differential — Breaks down the types of white blood cells:
- Neutrophils (40-70%) — Fight bacterial infections
- Lymphocytes (20-40%) — Fight viral infections and produce antibodies
- Monocytes (2-8%) — Clean up dead cells and debris
- Eosinophils (1-4%) — Fight parasites and involved in allergic reactions
- Basophils (0.5-1%) — Involved in allergic and inflammatory responses
Platelets
Platelets are essential for blood clotting. They help stop bleeding when you are injured.
- Normal: 150,000-400,000 cells/mcL
- Low platelets (thrombocytopenia) may cause easy bruising and prolonged bleeding
- High platelets (thrombocytosis) may increase the risk of blood clots
Lipid Profile: Your Heart Health Snapshot
A lipid profile (also called a lipid panel) measures the fats and fatty substances in your blood. It is one of the most important tests for assessing cardiovascular risk — especially relevant in the UAE, where heart disease is a leading cause of death.
- Total Cholesterol
- Desirable: Below 200 mg/dL
- Borderline high: 200-239 mg/dL
- High: 240 mg/dL and above
- LDL Cholesterol ('Bad' Cholesterol)
- Optimal: Below 100 mg/dL
- Near optimal: 100-129 mg/dL
- Borderline high: 130-159 mg/dL
- High: 160 mg/dL and above
- High LDL is the primary driver of plaque buildup in arteries (atherosclerosis)
- HDL Cholesterol ('Good' Cholesterol)
- Desirable for men: 40 mg/dL or higher
- Desirable for women: 50 mg/dL or higher
- Optimal: 60 mg/dL or higher
- Low HDL increases cardiovascular risk. Exercise, healthy fats, and weight loss can raise HDL.
- Triglycerides
- Normal: Below 150 mg/dL
- Borderline high: 150-199 mg/dL
- High: 200-499 mg/dL
- Elevated triglycerides are often linked to a diet high in refined carbohydrates, sugar, and alcohol
Liver Function Tests (LFTs): Monitoring Your Liver
Your liver performs over 500 vital functions, including filtering toxins, producing bile, and metabolizing medications. Liver function tests measure enzymes and proteins that indicate how well your liver is working.
- ALT (Alanine Aminotransferase)
- Normal: 7-56 U/L
- Elevated ALT is a sensitive indicator of liver cell damage. Common causes include fatty liver disease, hepatitis, alcohol use, and certain medications.
- AST (Aspartate Aminotransferase)
- Normal: 10-40 U/L
- Elevated in liver disease but also in heart or muscle damage
- ALP (Alkaline Phosphatase)
- Normal: 44-147 U/L
- Elevated in bile duct obstruction, bone disorders, or liver disease
- Bilirubin
- Normal total bilirubin: 0.1-1.2 mg/dL
- Elevated bilirubin causes jaundice (yellowing of skin and eyes)
- Albumin
- Normal: 3.5-5.5 g/dL
- Low albumin may indicate chronic liver disease, malnutrition, or kidney disease
Non-alcoholic fatty liver disease (NAFLD) is increasingly common in the UAE, affecting an estimated 25% of the population. Elevated ALT is often the first clue. If your ALT is consistently elevated, your doctor may recommend an ultrasound or further testing.
Kidney Function Tests: Protecting Your Kidneys
Your kidneys filter approximately 200 liters of blood daily, removing waste and excess fluid. Early kidney disease often has no symptoms, making regular testing essential.
- Creatinine
- Normal for men: 0.74-1.35 mg/dL
- Normal for women: 0.59-1.04 mg/dL
- Elevated creatinine suggests impaired kidney function (but can also be affected by muscle mass and dehydration)
- BUN (Blood Urea Nitrogen)
- Normal: 7-20 mg/dL
- Elevated in kidney disease, dehydration, or high-protein diets
- eGFR (Estimated Glomerular Filtration Rate)
- Normal: 90 mL/min or higher
- 60-89 mL/min: Mildly decreased — monitor regularly
- Below 60 mL/min: Moderate to severe kidney disease — requires medical management
- Below 15 mL/min: Kidney failure — dialysis or transplant may be needed
Thyroid Function Tests: Your Metabolism Controller
The thyroid gland regulates your metabolism, energy levels, and body temperature. Thyroid disorders are common in the UAE, especially among women.
- TSH (Thyroid Stimulating Hormone)
- Normal: 0.4-4.0 mIU/L
- High TSH suggests hypothyroidism (underactive thyroid) — symptoms include fatigue, weight gain, cold sensitivity, and depression
- Low TSH suggests hyperthyroidism (overactive thyroid) — symptoms include weight loss, rapid heartbeat, anxiety, and heat intolerance
- Free T4 (Thyroxine)
- Normal: 0.8-1.8 ng/dL
- Confirms thyroid function when TSH is abnormal
- Free T3 (Triiodothyronine)
- Normal: 2.3-4.2 pg/mL
- The most active thyroid hormone
Blood Sugar Tests: Diabetes Screening
- Fasting Blood Glucose
- Normal: 70-99 mg/dL
- Pre-diabetes: 100-125 mg/dL
- Diabetes: 126 mg/dL or higher
- HbA1c
- Normal: Below 5.7%
- Pre-diabetes: 5.7-6.4%
- Diabetes: 6.5% or higher
Tips for Understanding Your Lab Report
- Reference ranges vary by lab — Always compare your results to the specific reference range printed on your report, as they may differ slightly between laboratories.
- One abnormal result is not a diagnosis — A single out-of-range value often needs to be confirmed with a repeat test. Many factors, including dehydration, recent meals, stress, and medications, can temporarily affect results.
- Trends matter more than single values — Tracking your results over time gives a clearer picture than any single test. Request copies of all your lab reports and keep a personal health file.
- Context is essential — Your age, sex, medications, medical history, and even the time of day can influence results. Always discuss findings with your doctor, who can interpret them in the full context of your health.
- Do not self-diagnose — While understanding your results is empowering, resist the urge to Google symptoms or jump to conclusions. A qualified healthcare provider is the best interpreter of your lab work.
Knowledge is the first step toward better health. By understanding what your blood tests measure and what the results mean, you become an active participant in your healthcare — better equipped to ask the right questions and make informed decisions about your well-being.