emphasis on the precautionary principle, required labelling and temporarily reduced the acceptable daily intake (ADI) for the food colourings; the UK FSA called for voluntary withdrawal of the colourings by food manufacturers. However, in 2009 the EFSA re-evaluated the data at hand and determined that "the available scientific evidence does not substantiate a link between the colour additives and behavioural effects". There is no evidence to support broad claims that food colouring causes food intolerance and ADHD-like behaviour in children. It is possible that certain food colouring may act as a trigger in those who are genetically predisposed, but the evidence is weak. References External links Carcinogenic Potency Database Project entry for SX purple, alias Ponceau 4R Some more details, other common names Food colorings Azo dyes Organic sodium salts Naphthalenesulfonates 2-Naphthols Acid dyes