7 medical tests you should have regularly

Guide based on recommendations from health professionals.

The body sends signals even before visible symptoms appear. Clinical tests are key tools for detecting early health risks such as inflammation, deficiencies or hormonal imbalances. Doing them regularly can prevent future complications. Here are 7 tests recommended at least once a year or as advised by your doctor.

  1. Full blood count (FBC) with blood film — essential initial screening
    This basic test provides valuable information about general health:

  • Low white blood cells → possible weakening of the immune system, linked to stress, lack of sleep or nutritional deficiencies.

  • Raised eosinophils → possible parasitic infection.
    This test is especially useful when there is chronic fatigue or persistent stress.

  1. C-reactive protein (CRP) — early inflammation detection
    CRP measures systemic inflammation even without specific symptoms. It may indicate:

  • infectious processes

  • chronic stress

  • poor diet

  • gut imbalances
    Inflammation is a common factor in many chronic diseases, so monitoring it is advisable.

  1. Glucose–insulin curve — assessing insulin resistance
    This test measures the body’s response to glucose, detecting early disturbances. Elevated values can flag risks of:

  • type 2 diabetes

  • hypertension

  • polycystic ovary syndrome (PCOS)

  • metabolic disorders

  • cognitive decline
    Catching these changes in time allows effective preventive measures.

  1. Thyroid panel — key to overall balance
    Recommended parameters:

  • TSH, fT3, fT4

  • Anti-TPO and anti-TG antibodies

  • Thyroid ultrasound
    Ultrasound can identify:

  • nodules

  • cysts

  • thyroid atrophy
    Raised antibody levels may justify dietary adjustments—such as limiting gluten or casein—if medically advised.

  1. Vitamin D3 — immune and protective factor
    Vitamin D3 deficiency is associated with a higher risk of infections, autoimmune diseases, depression and certain cancers. The suggested optimal range is 50–80 ng/mL. Supplementation is recommended especially in autumn and winter, with periodic monitoring.

  2. Ferritin and iron — uncovering hidden deficiencies
    Ferritin reflects iron stores. Low values (<30 ng/mL) may indicate deficiency even when serum iron is normal. Common symptoms include cold hands, hair loss and fatigue. Frequent causes include gut inflammation, parasites and food intolerances.

  3. Liver function — interpreting beyond “normal” ranges
    Accepted ALT and AST ranges have risen over time due to the prevalence of fatty liver. Even within range, aiming for below ~20 is suggested to support a healthy liver. A balanced diet, fewer ultra-processed foods and limited alcohol help protect it.

Conclusion
Clinical tests are an investment in preventive health. Detecting changes before visible symptoms appear allows timely action. Listening to your body and scheduling regular check-ups is key to maintaining wellbeing and quality of life.

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