I don't know for sure OSAHM, But I think there is a link.
I know how the sugar rush affects me if I want an energy boost and then the drop when it has worn off, and they are such tiny wee things really. I definitely think if it doesn't cause the behaviour, it has the potential to magnify it a little.
This is from the HACSG website;
''The EU, from 20th July 2010 require all products containing the 6 colourings and preservative, Sodium Benzoate, to carry an extra label ?may have an adverse effect on Activity and Attention in Children?.
The six colourings are Tartrazine (E102), Quinoline Yellow(E104), Sunset Yellow (E110), Carmosine (E122), Ponceau 4R (E124) and Allura Red(E129). There are a further 12 Artificial colourings which the HACSG and others feel should be included but which were not studied in the Southampton Research.
The HACSG would like to see a ban on all Artificial Colourings, not just a warning label for six colours, but after 33 years I suppose we must still be patient and be grateful for the EU action taken so far.''
I also put DS on omega oils at about that age (omega 3 and 6).
Research Aspartame a bit (the sweetener they use to replace sugar) Or I will try to find the link to a very good thread about it on here. It's alarming.
found the link
It might not stop all behaviour but is worth a thought.