GEMMA, which stands for Genome , Environment, Microbiome and Metabolome in Autism, is a multicentre European Commission Project for exploring interactions between gut microbiome, metabolome, epigenome and immune function in order to discover new biomarkers useful for early diagnosis of autism, which would pave the way for early intervention. The European Commission has selected and financed GEMMA project as part of its Horizon 2020, the biggest EU Research and Innovation programme. The grant consists of 14,2M€ in 5-years project starting January 2019