The exact causes are unknown but scientists are researching several risk factors that may play an important role in ADHD:

  •  Studies suggest that genetics play an important role in ADHD and that the disorder tends to run in families.
  •  Although it is fairly uncommon, children who have suffered some type of brain injury may exhibit behaviors typical to those of ADHD.
  •  Young children who are exposed to large amounts of lead (found in old paint, plumbing, etc.) may be at higher risk for ADHD.
  •  Research has shown that smoking cigarettes and drinking alcohol during pregnancy may be linked to ADHD in children.
  •  Food additives, maternal exposure to environmental poisons during pregnancy, premature birth, and low birth weight may also be linked to ADHD according to some research.

Additionally, it is commonly believed that excessive amounts of sugar or television can lead to ADHD in children, however there is not enough evidence to link either to ADHD.

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