CRP and inflammatory bowel disease: Blood tests (full blood count, erythrocyte sedimentation rate, C reactive protein, liver function tests and albumin) will show abnormalities in around 80% of cases in inflammatory bowel disease (IBD), and thus, form part of the initial assessment of suspected cases.3 Faecal tests such as calprotectin are useful adjuncts to these blood tests in identifying inflammation, but levels can be elevated by causes apart from IBD.4