Original sentence: However, it has been noticed that a large portion of children with ADHD seem to be addicted to milk.Mainstream medical experts have suggested that, in many cases, the disorder is genetically conferred and is caused by an imbalance or deficiency in certain chemicals that regulate the efficiency with which the brain controls behavior.This contention has not been proven, according to critics, who question the validity and commercial motivations behind such theories
Edited sentence: However, it has been noticed that a large portion of children with ADHD seems to be addicted to milk.Scientific evidence suggests most strongly that, in many cases, the disorder is genetically transmitted and is caused by an imbalance or deficiency in certain chemicals that regulate the efficiency with which the brain controls behavior