Have you heard the saying 'Eat breakfast like a king, lunch like a prince, and dinner like a pauper.'?
In tracking down the exact phrase I came across this
article that backs it up.
Adelle Davis is credited with this phrase. Another site describes her as being "an American pioneer in the field of nutrition during the mid-20th century. She was an outspoken advocate of the superior value of whole unprocessed foods, the dangers of food additives, and the dominant role that all nutrients play in maintaining health, preventing disease, and restoring health after the onset of disease."
More info on her here...
