Intended for healthcare professionals

Letters Tax on soft drinks to reduce obesity

Is a tax on sugary drinks too bitter to swallow?

BMJ 2013; 347 doi: (Published 27 November 2013) Cite this as: BMJ 2013;347:f7039
  1. Laura Cornelsen, research fellow1,
  2. Rosemary Green, research fellow1,
  3. Alan D Dangour, senior lecturer1,
  4. Richard D Smith, professor of health system economics1
  1. 1Leverhulme Centre for Integrative Research on Agriculture and Health, London School of Hygiene and Tropical Medicine, London WC1E 7HT, UK
  1. laura.cornelsen{at}

Briggs and colleagues’ study is a useful addition to the evidence on the potential health impact of taxes on sugar sweetened drinks.1 But to convince policy makers of the effectiveness of such taxes we urgently need experimental studies that allow stronger causal inference than modelled projections based on historic consumption data. Furthermore, non-economic determinants of food consumption such as …

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