Diet and Autism

Hello, this is my first post and the forum is new to me!

I have two very young children diagnosed with ASD with very different needs and challenges.

We have begun to explore diet, and last year I stripped out Gluten and Diary.  I saw massive changes (some short term) ranging from a mute child to a first word in the first 3 months.

I am now exploring diet further and have been advised to remove soya, sugar and look at organic food. 

Has anyone gone down this path? I have found no professional (nhs) that entertains this idea yet I have seen first hand that diet (and probiotics) have an impact on my children.

Would be great to hear from anyone that is looking into this too!

Thanks xx