Randox Health also known as Randox Laboratories or Randox Toxicology/Randox Food Diagnostics or simply Randox, is an international health and toxicology company in the in vitro diagnostics industry headquartered in the UK. The world’s first biochip array technology developer, the company develops diagnostic solutions for hospitals, clinical, research and molecular labs, food testing, forensic toxicology, veterinary labs and life sciences. It develops, manufactures and markets reagents and equipment for laboratory medicine, with a distribution network of 145 countries. Randox is the biggest polymerase chain reaction testing provider in the UK and Ireland. Randox received three contracts from the Department of Health and Social Care without having to compete for a tender.

In 2020, Randox was awarded nearly £500 million by the UK government to provide private-sector COVID-19 testing at the cost of about £49 per kit. The company has signed a two-year deal with the British Olympic Association to test the British Team for COVID-19.

It is the official sponsor of the Randox Health Grand National since 2017.