A Marker of Hepatic Dysfunction

Benefits of the Randox Bilirubin Assay


Excellent correlation

The Randox bilirubin assay has a correlation coefficient > 0.99% CV when compared to commercially available methods.


Direct & Total assays available

Randox offer both direct & total bilirubin assays offering choice and flexibility.

Liquid ready-to-use

Liquid ready-to-use

The Randox bilirubin assay is available in a liquid ready-to-use format for convenience and ease-of-use.

Calibrator & Controls

Calibrator and dedicated control available

Calibrator and dedicated control available offering a complete testing package.

Applications available

Applications available detailing instrument-specific settings for the convenient use of the Randox bilirubin assay on a variety of clinical chemistry analysers.

  • Ordering Information
  • Physiological Significance
  • Clinical Significance
  • COVID-19


Cat NoSizeMethod
BR1234562 x 250 (L)Modified JendrassikEnquireKit Insert RequestMSDSBuy Online
BR3807R1 2 x 30ml (L)
R2 8 x 4ml
JendrassikEnquireKit Insert RequestMSDSBuy Online
(L) Indicates liquid option


Cat NoSizeMethod
BR23612 x 250ml (L)Modified JendrassikEnquireKit Insert RequestMSDSBuy Online
BR3859R1 2 x 50ml (L)
R2 8 x 4ml
JendrassikEnquireKit Insert RequestMSDSBuy Online
(L) Indicates liquid option

Direct & Total

Cat NoSizeMethod
BR411R1. 1 x 50ml (L)
R2. 1 x 10ml
R3. 1 x 100ml
R4. 1 x 100ml
JendrassikEnquireKit Insert RequestMSDSBuy Online

Instrument Specific Applications (ISA’s) are available for a wide range of biochemistry analysers.  Contact us to enquire about your specific analyser.

Bilirubin is a metabolite of haem, derived from haem-containing proteins, including myoglobin, haemoglobin and various P450 enzymes, that serves to coordinate iron in various proteins. Half of it is excreted into bile and the rest contributes to blood bilirubin turnover 1. It is mainly produced in the spleen and liver but can also occur elsewhere in the body by macrophages and renal tubular cells 2. The internal hydrogen bonding causes it to be water-insoluble and so required enzyme-mediated glucuronidation in the liver for biliary excretion. Under normal conditions, it is mostly unconjugated and bound tightly to albumin 3.

Bilirubin is one of the most common diagnostic tests utilised in the diagnosis and monitoring of hepatic dysfunction. It is impaired in cholestatic and parenchymal liver diseases. The most common condition associated with elevated levels is jaundice (a clinical sign of hyperbilirubinaemia), characterised by the yellow colouring of skin, mucous membranes and sclera 3.

Today, it is recognised as being more than just an end-product and considered to be a fundamental substance. Bilirubin is recognised as acting as an antioxidant and anti-inflammatory agent in serum. Evidence exists that states that it can neutralise free radicals, prevent peroxidation of lipids and protects the cardiovascular system, hepatobiliary system, immune system, neuronal system and pulmonary system 4.

It has been established that bilirubin levels are significantly elevated in COVID-19 patients 5. Patients with abnormal liver function tests were at a significantly higher risk of progressing to a severe disease, such as pneumonia. The presence of abnormal liver function tests became more pronounced during hospitalisation within two weeks, with total bilirubin levels elevated 3 times the upper normal limit 6.

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