There are many culminating factors involved in gut, immune and neurological disorders.  Common environmental factors include significant rises in air and water pollution, toxic chemicals in building materials, play equipment and personal care products, heavy metals, poor food choices, food contamination, pesticides, herbicides, insecticides, artificial oestrogens in plastic containers, food and personal care products, medications, stress and many more.  All have a direct and detrimental effect on cellular health.  

Other factors that contribute to Autism, ASD and AD/HD is a family history of allergies, eczema, asthma, depression, schizophrenia, thrush, irritable bowel syndrome, inflammatory gut disorders and / or autoimmune diseases.