ALCAT test
The antigen leukocyte antibody test (ALCAT test) is one that claims to measure adverse reactions to dietary substances. It was created by American Medical Testing Laboratories and is now marketed by Cell Science Systems (also known as ALCAT Diagnostic Systems) of Deerfield Beach, Florida. Researched conducted at Yale School of Medicine published in BMJ Open Gastroenterology in 2017 demonstrated improvement for those with irritable bowel syndrome
A study conducted in 2014 demonstrated reactions identified as "severe" were associated with the up-regulation of CD11b on CD4+ and CD8+ T cells, suggesting a basis for further research into the mechanisms alleged.
Research published up to 2010 did not support the test or provide evidence that it was a reliable medical diagnostic tool; since it had not been validated. In a position statement, the Australasian Society of Clinical Immunology and Allergy classified the ALCAT with other forms of cytotoxic tests as inappropriate tests, saying of them