I know what you are all saying but out of desperation i conducted an experiment with my 5 year old when he was about 2.
gave him water or milk to drink, dont buy organic, too expensive. but just spent 2 weeks concentrating on what he ate.
he was considerably calmer. saw it with my own 2 eyes.
now as long as he has fruit and veg every day, i allow him to have a flump, or something of that description.
for want of a better bargaining tool, sweets and chocs are great for curbing bad behaviour and for using as a threat.
I think that it is also the readily available junk that is every where you look nowadays.
there were no macdonalds in the 70's, there were sweet shops and i could get a large bag of them for 10p, but i dont remember having them willy nilly iyswim.
common sense tells me that some foods are just not good. although dh lives on spam (bowk) and are not serving as a healthy future for my child.
i want him to live a long and healthy life, if i set him up well now, then i think he will be alright.....then when he is able to make his own choices and he grows an ass as big as mine, it shall all be in vain...sigh