Zhang Liyuan Autism Step Singapore  Zhang Liyuan Autism gives some best treatments to eliminate autism disorder completely. Because all over the world, there is only a few organization who provides autism therapies. Autism occurs during childbirth. Many children have found genetic changes during autism. Because autism has not been shown to becaused by any infections and virus. But ASD found only in a chronic disorder. But according to research, clearly shown that all chronic disorders are caused by any one of several nutritional deficiencies. Nutrition such as vitamins, minerals, amino acids, fatty acids, and cholesterol.