1,25-Dihydroxy Vitamin D Assay Launch

4 April 2012

Immunodiagnostic Systems Holdings plc

("IDS" or '"the Company")

Launch of automated 1,25-Dihydroxy Vitamin D assay on the IDS-iSYS system

Today, IDS has launched the first ever automated assay for 1,25-dihydroxyvitamin D. This test is available on the IDS-iSYS immunoassay system and increases the number of tests available on the system to 11. Currently 7 tests are able to be sold in the US market, the 1,25 dihyroxyvitamin D test will be not be available in the USA until it is submitted to and cleared by the US FDA (Food and Drug Administration).

IDS is one of the leaders in the development and manufacture of vitamin D immunoassays and also has a comprehensive repertoire of 1,25-dihydroxyvitamin D manual tests. Indeed, IDS believes the assay launched today will transform the 1,25-dihydroxyvitamin D testing workflow for laboratory professionals with fast, accurate and reliable results.

Ian Cookson, CEO at IDS, said: "This test is a prime example of our commitment to deliver innovative and effective products and we are proud to be the first diagnostic company to offer tests for both 25 hydroxyvitamin D and 1,25-dihydroxyvitamin D on the same automated system. It will improve efficiencies in vitamin D testing for laboratories and increase the value of the IDS-iSYS systems already in place, as well as supporting new system placements."

The Company will issue its trading update statement for the year ended 31 March 2012 on Thursday 12 April 2012.

Notes to Editors

More about the IDS-iSYS 1,25-Dihydroxy Vitamin D test : The 1,25-Dihydroxy Vitamin D test is used to assess 1,25-dihydroxyvitamin D deficiency associated with renal disease and is also useful in the diagnosis of disorders in the metabolism of 25 hydroxyvitamin D and phosphate. Approximately 5 million 1,25 dihyroxyvitamin D tests are performed annually across Europe and USA*.

The IDS-iSYS 1,25-Dihydroxy Vitamin D kit is a complete test system with the proven immunocapsule extraction and automated chemiluminescence immunoassay. This enables the quantitative determination of 1,25-dihydroxyvitamin Din human serum and plasma in a single working day.

* Data source: EAC survey 2010

ENDS

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