In 2002, a randomised, double-blind, placebo-controlled trial showed that nutritional supplementation could reduce violence in prison by 37%. This study has since been replicated in prison populations in the UK, The Netherlands and Singapore. So why, when violence in UK prisons, including assaults on staff, is at an all time high are we not using this cheap, low-risk, accessible intervention? In this episode I speak to scientists behind this inexplicably ignored research.

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