“The diet is not suitable for all...”: On the British and Irish web-based discourse on the Ketogenic Diet

This paper is aimed at analysing the discourse tools and argumentative resources at work in the debate on the Ketogenic Diet (KD), an increasingly popular regimen with far-reaching clinical implications. The study centred on two small comparable corpora including web-based materials from relevant stakeholders in the debate on the KD, namely health institutions, charities and the press from the UK and Ireland. From a methodological point of view, the study consisted of two main stages: first of all, a quantitative analysis of phraseology focusing on lexical bundles; secondly, a qualitative study of patterns of argumentative discourse, for the purpose of identifying common argument schemes and their relationship in the overall argument structure. On the one hand, the British discourse on the KD broadly reflects the deeply-held conviction that the diet should be given proper consideration, especially in the treatment of drug-resistant epilepsy. On the other hand, the Irish discourse on the diet appears to be more complex and multi-layered. The role of the KD as a significant component of epilepsy treatment is acknowledged, but at the same time citations from influential figures often fulfil different argumentative commitments.