Extended kidney screen


The kidneys filter your blood and remove waste products that naturally occur in the body. Targeting kidney health, it provides an extended assessment of kidney function, aiding in the early detection of kidney-related issues and complications.

SKU: RD006 Category:


The kidneys filter your blood and remove waste products that naturally occur in the body. They regulate the body’s pH, fluid balance and the level of electrolytes – potassium, sodium, chloride, and bicarbonate – which are essential for the body to function correctly.

Our renal test will check the volume of sodium and the two waste products produced by the kidneys (creatinine and urea), as an excess of these chemicals in your blood may suggest kidney disease, damage or failure, or be the result of dehydration.

We will also look at how well the glomeruli in your kidneys are filtering the blood, known as the estimated glomerular filtration rate (eGFR).

The amount of uric acid and protein in your blood will be checked as part of this kidney screen. The two main types of protein measured are albumin and globulin. Low levels of protein may be caused by liver or kidney problems, or a problem with absorption. Albumin is produced by the liver and exists in blood plasma – it plays a major role in preventing fluid from leaking out of the blood vessels and transports hormones, vitamins and minerals.

  • Albumin
    Albumin is the most abundant protein in the blood plasma, produced by the liver. It plays a vital role in maintaining the osmotic pressure needed for proper distribution of bodily fluids between blood vessels and body tissues. Additionally, albumin serves as a carrier protein for various substances including hormones, vitamins, and drugs. Measuring albumin levels is important for assessing liver and kidney function, as well as nutritional status. Low albumin levels can indicate liver disease, kidney disease, malnutrition, or inflammatory diseases. High albumin levels are less common and can be due to dehydration or high protein intake.

  • Basophils
    These cells play a role in allergic responses. Elevated levels can be seen in allergies, chronic inflammation, and certain blood disorders.

  • Creatinine
    Creatinine is a waste product that is produced continuously during normal muscle breakdown. The kidneys filter creatinine from the blood into the urine, and it is then eliminated from the body. Because muscle tissue is fairly constant in the body, the production of creatinine tends to be relatively stable on a daily basis. Elevated blood creatinine levels can indicate impaired kidney function or kidney disease. It can also be temporarily increased by a high meat diet, certain medications, and heavy exercise. Low levels are less common and are usually not a concern, but they can be associated with conditions that result in decreased muscle mass.

  • Eosinophils
    Eosinophils are a type of white blood cell that play a key role in the body's immune response, particularly in fighting parasitic infections and in allergic reactions. They are part of the body's immune system and are produced in the bone marrow. Eosinophils can be measured through a blood test, often as part of a complete blood count (CBC).
    • High Levels of Eosinophils (Eosinophilia): Can indicate allergic reactions, parasitic infections, autoimmune diseases, and certain types of leukemia or other health conditions.
    • Low Levels of Eosinophils: Generally not a concern and can occur with the use of certain medications, like corticosteroids, or during acute infections.

  • Estimated Glomerular Filtration Rate (eGFR)
    Estimated Glomerular Filtration Rate (eGFR) is a key test used to assess kidney function. It estimates the rate at which the kidneys filter waste products from the blood. eGFR is calculated using serum creatinine levels, along with factors like age, sex, and body size. A normal eGFR indicates good kidney function, while a low eGFR suggests impaired kidney function, potentially signifying kidney disease. This test is crucial in detecting early kidney damage, monitoring kidney disease progression, and determining the effectiveness of treatment for kidney-related conditions. Regular eGFR testing is particularly important for those with risk factors for kidney disease, such as hypertension or diabetes.

  • Ferritin
    Ferritin is a protein that stores iron in the body, releasing it in a controlled way when needed. It's a crucial indicator of the total iron stores in the body. Ferritin levels are often measured to assess iron deficiency or iron overload. Elevated levels can indicate conditions such as haemochromatosis (iron overload), liver disease, chronic inflammation, infection, or certain types of cancer. Low levels are commonly associated with iron deficiency anaemia, indicating depleted iron stores. This can be due to insufficient dietary intake, increased iron requirements, chronic blood loss, or problems with iron absorption.

  • Haematocrit (Hct)
    This assesses the percentage of blood volume composed of red blood cells. It helps diagnose and monitor conditions like anaemia, polycythaemia, and hydration status.

  • Haemoglobin (Hb)
    Haemoglobin (Hb) is a vital protein in red blood cells responsible for transporting oxygen from the lungs to the rest of the body and returning carbon dioxide from the tissues back to the lungs. It gives red blood cells their characteristic color and is essential for cellular respiration.
    • High Haemoglobin Levels: Elevated levels can occur in conditions like polycythemia vera, chronic lung disease and smoking, dehydration, or living at high altitudes.
    • Low Haemoglobin Levels: Low levels are indicative of anaemia, which can result from a variety of causes including iron deficiency, chronic diseases, blood loss, or bone marrow problems.

  • Iron
    Iron is a vital mineral in the body, essential for the production of hemoglobin, the protein in red blood cells that carries oxygen to the body's tissues. Iron levels in the blood can be measured to assess the body's iron stores and to help diagnose conditions related to iron imbalance. High Iron Levels: Elevated iron levels can be indicative of hemochromatosis (a condition leading to iron overload), excessive iron supplementation, or certain types of anaemia. Low Iron Levels: Low iron levels typically suggest iron deficiency, which can lead to iron deficiency anaemia. This might be due to inadequate dietary intake, increased needs during pregnancy, blood loss, or problems with iron absorption.

  • Lymphocytes
    These cells are vital in the immune response against viral infections. Abnormal levels can indicate viral infections, lymphoma, or immune disorders.

  • Mean Cell Haemoglobin (MCH)
    Measures the average haemoglobin content in an individual red blood cell. It's useful in diagnosing the type of anaemia.

  • Mean Cell Haemoglobin Concentration (MCHC)
    This test measures the concentration of haemoglobin in a given volume of red cells, aiding in distinguishing between different types of anaemia.

  • Mean Cell Volume (MCV)
    Indicates the average size of red blood cells. It helps in classifying anaemias as microcytic, normocytic, or macrocytic. • High MCV indicates macrocytic anaemia, often due to Vitamin B12 or folate deficiency. • Low MCV suggests microcytic anaemia, commonly due to iron deficiency.

  • Mean Platelet Volume (MPV)
    Provides information about platelet production in bone marrow and can indicate risks for diseases like heart disease or thrombosis.

  • Monocytes
    A type of white cell involved in fighting certain infections and helping other white blood cells remove dead or damaged tissues.

  • Neutrophils
    A subtype of white blood cell, crucial in fighting bacterial infections. Abnormal levels can indicate bacterial infections, stress, or bone marrow disorders.

  • Platelets
    Essential for blood clotting. The test can diagnose or monitor bleeding disorders, thrombocytopenia, or thrombocythemia.

  • Red Blood Cells (RBC)
    Measures the number of red blood cells, which are vital for transporting oxygen throughout the body. An abnormal count can indicate conditions like anaemia, dehydration, or bone marrow disorders. • High levels can indicate polycythaemia vera or dehydration. • Low levels suggest anaemia or haemorrhage.

  • Red Cell Distribution Width (RDW)
    Assesses the variation in red blood cell size, which can help in diagnosing specific types of anaemia.

  • Sodium
    Sodium is an essential electrolyte in the human body, primarily involved in regulating fluid balance, nerve function, and muscle contraction. It is crucial for maintaining blood pressure and is a key component of plasma, lymph, and extracellular fluid. Sodium levels in the body are tightly controlled, and imbalances can have significant health implications. High sodium intake is commonly associated with high blood pressure and cardiovascular diseases, while low sodium levels can lead to hyponatremia, affecting neurological functions.
    • High Levels (Hypernatremia): Often due to dehydration or certain hormonal imbalances.
    • Low Levels (Hyponatremia): Can result from conditions causing fluid imbalance, certain medications, or heart, kidney, or liver problems.

  • Total Iron Binding Capacity (TIBC)
    Helps assess the body's ability to transport iron in the blood. • High Levels: Often seen in iron deficiency anaemia. • Low Levels: May indicate iron overload, malnutrition, or liver disease.

  • Total Protein
    Provides information about the total amount of albumin and globulin in the blood. Abnormal levels can suggest a variety of conditions including liver and kidney disorders, nutritional problems, and chronic diseases.

  • Transferrin Saturation (TSAT)
    Transferrin Saturation (TSAT) is a blood test that measures the percentage of transferrin, a protein that transports iron in the blood, bound to iron. It is a useful indicator of iron availability and metabolism in the body. Elevated TSAT can indicate iron overload, which may be due to conditions like hemochromatosis, excessive iron intake, or certain types of anemia where iron is poorly utilized. Low levels suggest iron deficiency, commonly seen in iron deficiency anaemia. It can occur due to inadequate dietary intake, increased iron requirements, or chronic blood loss.

  • Unsaturated Iron Binding Capacity (UIBC)
    Used in conjunction with other iron tests to assess iron metabolism. • High Levels: Typically indicates iron deficiency. • Low Levels: May suggest iron overload or inflammation.

  • Urea
    High levels can indicate kidney dysfunction or conditions that reduce blood flow to the kidneys.

  • Uric Acid
    Uric acid is a waste product formed from the breakdown of purines, which are substances found in various foods and also produced by the body. It is normally dissolved in the blood, processed by the kidneys, and then excreted in urine. High Uric Acid Levels: Elevated levels can lead to gout, a type of arthritis caused by uric acid crystal deposition in joints. High uric acid can also contribute to kidney stones and kidney damage. It may be caused by a diet high in purines, obesity, certain medications, alcohol, and some medical conditions. Low Uric Acid Levels: Less common and usually not a concern, but can occur in conditions like liver disease, certain genetic disorders, or can be due to excessive uric acid excretion.

  • White Blood Cells (WBC)
    This count measures the body's immune cells. Abnormal counts can indicate infections, inflammatory diseases, and hematologic conditions.

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How it Works

Choose one of our test packages according to your needs – whether this would be general health screening, nutritional state, sexual health or monitoring of a chronic condition and get it delivered to your home or office.


Perform the test at your comfort zone. This will require a fingerprick, swab of urine sample collection. Instructions will be included in your kit. Post it back to one of our accredited laboratories in a prepaid envelope.


We will notify you when results are available and you can access it in your dashboard together with advice from our health experts. Repeat tests as recommended and track results to keep your health in a good shape all the time.

Video tutorial

This video shows step-by-step guidance on how to use The Red Drop blood collection kits