Sleep and athletic performance with Goji berry juice
September 7th, 2008 by Lesley Forrester

A study published in the Journal of Alternative Medicine shows promising benefits from the consumption of Goji juice.
increased ratings for energy level, athletic performance, quality of sleep, ease of awakening, ability to focus on activities, mental acuity, calmness, and feelings of health, contentment, and happiness
You can read the full abstract here, although note the study was sponsored by a producer of Goji berry products:
