||Comment on 'Non-invasive monitoring of chewing and swallowing for objective quantification of ingestive behavior'
||The paper of Sazonov et al.  addresses the topic of on-body sensor-based measurement and analysis of food intake and eating behaviour. The authors rightly pinpoint a lack of solutions to estimate eating behaviour and energy intake in contrast to the active development of energy expenditure prediction tools. Unfortunately, Sazonov and colleagues have missed to review a considerable amount of published research in the field of ubiquitous and wearable computing. Moreover, it should be noted that objective measurement techniques exist for laboratory studies of chewing and swallowing that could have served for the validation of their work. This letter summarises relevant related works and identifies refinements of the study methodology suggested by Sazonov et al. Food intake behaviour is very variable and hard to capture. Nevertheless the approaches towards Automatic Dietary Monitoring (ADM) cited in this letter confirm a broad potential for sensing and pattern recognition techniques. ADM could eventually supplement or replace intake diaries.