Figure 3From: Randomised controlled trial of the effects of L-ornithine on stress markers and sleep quality in healthy workers Effect of L-ornithine supplementation on OSA. Means of the change from 0 weeks of each OSA score (A, sleepiness on rising; B, initiation and maintenance of sleep; C, frequent dreaming; D, refreshing; E, sleep length) to 1, 2, 3, 4, 5, 6, 7 and 8 weeks: mean ± SE. White circles (○) indicate the placebo and black circles (●) indicate L-ornithine.Back to article page