My ASD son, now 18, is definitely sensitive to glutamates, both artificially added and naturally occurring. His tolerance has improved over the years - he can have small amounts without too much effect, eg some peas in food. Artificial glutamates are another story - definite behavioural changes with these. I have even noticed changes after eating certain rice crackers that have soy sauce in the ingredients list.

It has been harder to control his diet now that he is 18 - he often sneaks food that he is not supposed to eat, and is in denial about the effects on his mood and behaviour. We get nasty mood swings and extreme anger that is easily triggered. He is not a small 18 year old, and it means that sometimes we are all walking on eggshells around him to try not to trigger the anger. He is never violent to people, but often throws things, smashes things, slams doors etc. As you can imagine, this is very stressful to deal with and live with. He is already on medication to help with his behaviour. We have done the failsafe diet since shortly after my son was diagnosed, so about 14 years – Leanne

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