Common lab tests explained in plain language
CBC, HbA1c, lipid profile, thyroid. What do these tests check, and why might your doctor ask for them?
Medisri Team5 October 2026 6 min read
Key takeaways
- Each test looks at a different part of your health, such as blood cells, sugar or cholesterol.
- Normal ranges vary between labs, so read results against the range printed on your report.
- Always discuss your results with your doctor rather than interpreting them alone.
Lab reports can look like a wall of numbers. Knowing what each common test is for makes it easier to have a useful conversation with your doctor.
Complete Blood Count (CBC)
Looks at your red blood cells, white blood cells and platelets. It's often used to check for anaemia, infections and general health.
HbA1c
Shows your average blood sugar over roughly the past three months. It's widely used to screen for and monitor diabetes.
Lipid profile
Measures cholesterol and triglycerides in your blood, which helps assess heart health.
Thyroid tests (TSH, T3, T4)
Check how well your thyroid gland is working. An over- or under-active thyroid can affect energy, weight and mood.
Liver and kidney function tests (LFT, KFT)
Give a picture of how well your liver and kidneys are working, and are often part of routine health checks.
Vitamin D and Vitamin B12
Low levels of these vitamins are common and can cause tiredness and other symptoms. Your doctor may test them if you have related complaints.
Every lab prints its own reference range next to your result. A value slightly outside the range isn't always a concern, so let your doctor interpret it.
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