He advised that people should eat a balanced diet with plenty of fruit and vegetables.

BBC: Hidden benefits for apple-eaters

For those who eat a balanced diet, scientists have found no quantifiable benefit from taking multivitamins.

CNN: Herbal remedies need real scrutiny

The unpalatable truth seems to be that some Americans simply do not care to eat a balanced diet, while others, increasingly, cannot afford to.

ECONOMIST: A shortage of healthy food is not the only problem

Some thin people exercise excessively and don't eat a balanced diet, and there are people in the overweight and obese categories who have good diets and are active, she said.

CNN: Thin is in, but fat might be better

In general, current recommendations are that all children -- regardless of whether or not they have ADHD -- eat a balanced diet heavy on fruits and vegetables and low on fatty junk food.

CNN: What are the long-term effects of ADHD meds?

Eat a balanced diet.

NPR: Excerpt: 'Delivered from Distraction'