First, you absolutely want to remove sugar from your diet. Sugar can cause a lack of focus, or hyperactive behavior. Secondly, you want to load up your diet with healthy protein, fat, and fibers. This will keep your blood sugar steady. You will want to have a high, nutrient-dense diet that includes vegetables, fruits, nuts and seeds, organic meats and foods high in omega-3 fatty acids.
The top supplement you want to include in your diet to treat ADHD is fish oil (500-1000mg daily). Another supplement that can support the nervous system, brain, and focus is vitamin B complex.
Lastly, vetiver and cedarwood essential oils are the most effective essential oils you can use for treating ADHD. Take two drops of each oil and rub them on your neck and temple for improvement on focus. For more information on ADHD, you can check out my article: http://draxe.com/natural-remedies-adhd/