Haemoglobin Blood Test

A haemoglobin blood test is one of the most common pathology tests requested by doctors. It measures the amount of haemoglobin (the protein in red blood cells that carries oxygen throughout the body) there is in the blood. Having the right level of haemoglobin is essential for energy, brain function, and overall health. Low or high results can indicate a range of conditions, from anaemia to dehydration, making this test an important tool for understanding your wellbeing.

At Evergreen Doctors, we provide comprehensive haemoglobin blood testing as part of our holistic approach to care. Our team uses functional medicine principles to investigate why haemoglobin levels are outside the optimal range and design a plan to restore balance.

Why a Haemoglobin Blood Test Matters

Haemoglobin plays a vital role in transporting oxygen from the lungs to tissues. When levels are too low, the body struggles to get enough oxygen, which can lead to fatigue, weakness, and shortness of breath. When levels are too high, the blood can become thicker, increasing the risk of clotting problems.

A blood haemoglobin test can help detect conditions such as:

  • Iron-deficiency anaemia, the most common cause of low haemoglobin

  • Chronic blood loss from heavy periods or gastrointestinal issues

  • Vitamin B12 or folate deficiency

  • Chronic disease or inflammation affecting red blood cell production

  • Dehydration or lung conditions that can cause elevated haemoglobin

If you are experiencing symptoms such as tiredness, dizziness, pale skin, or frequent headaches, booking an HB blood test can provide clarity and guide your next steps.

What to Expect During Haemoglobin Blood Testing

A haemoglobin test is quick and simple. A small sample of blood is taken, usually from a vein in your arm. Results are generally available within 24 to 48 hours. At Evergreen Doctors, we clearly explain your results, including their implications for your metabolic and overall health.

Because we take a functional medicine approach, we don't just look at whether your result falls within the “normal” range. We investigate underlying factors that may contribute to low or high haemoglobin levels, such as nutrient deficiencies, inflammation, or hormonal changes, and create a plan to address them.

What Happens if Your Haemoglobin Is Low

If your haemoglobin is low, treatment will depend on the cause. In cases of iron deficiency, we may recommend dietary adjustments or iron supplementation. For more severe deficiencies, an iron injection may be necessary to rapidly restore levels. We also look for potential sources of blood loss and assess whether other nutrients, such as B12 or folate, need support.

If your haemoglobin is high, we investigate possible causes such as dehydration, smoking, or chronic respiratory issues. Addressing the underlying factor helps bring levels back into a healthy range.

Why Choose Evergreen Doctors

Our functional medicine doctor Sydney team combines conventional testing with advanced diagnostics to get a full picture of your health. Haemoglobin results are considered alongside other markers, such as ferritin, vitamin levels, and inflammation markers, to create a comprehensive picture of your red blood cell health.

We see many patients through our metabolic health clinic, where haemoglobin testing is often the first step in identifying issues affecting energy, mood, and cognitive function. Our goal is not just to treat lab numbers but to help you feel better and maintain long-term health.

FAQs About Haemoglobin Blood Tests

  • A HB blood test is used to check for anaemia, monitor chronic conditions, or investigate symptoms such as fatigue, dizziness, and shortness of breath.

  • No special preparation is required. Some patients may have additional tests ordered simultaneously, such as iron studies, which may require fasting.

  • This depends on your health status. Individuals with anaemia, chronic illnesses, or nutrient deficiencies may require more frequent monitoring. Your doctor will advise what is appropriate.

  • Typical ranges are slightly different for men, women, and children. Your results will be compared to reference ranges from the laboratory, and your doctor will explain their meaning.

  • Yes. Eating iron-rich foods such as red meat, leafy greens, legumes, and fortified cereals can help. Vitamin C improves absorption, so pairing iron-rich foods with citrus or capsicum is beneficial.