Colour can be a problem if it is absorbed through the skin. The main problem here is that ADHD children at childcare and Kindy play with coloured finger paint, coloured grains or pasta, or just coloured water. Parents often report that when nothing else has changed and the diet is working well reactions occur after they have coloured skin after returning from care. The trick is to advise the caregivers to do painting with big brushes, to dilute the colour used, or to gently wash the skin afterwards with a sand soap so that the colour is removed.
Many report reactions to new clothes where the dye must irritate the skin, particularly coloured underwear. It is wise to wash new coloured garments a few times before wearing. Reactions to hair dye also occur. These can be minimised by combing the dye through and pinning coloured hair up so that the dye does not touch the skin. See P 23 of Are You Food sensitive? for other non food items to watch.