What are the health benefits to drinking cranberry juice?

Regarding seratonin release, Charles Poliquin has been quoted to say

“If your morning urine is overly acidic, and you also suffer from early morning fatigue, Licorice is probably the best adrenal rebuilding supplement for you. Take 2 tablets upon awakening, and two more with your lunch meal.”

“Cranberry juice in the morning will raise serotonin, wrong time of day… you can’t look at the World through a straw”