Figure 4From: Vernonia cinerea Less. supplementation and strenuous exercise reduce smoking rate: relation to oxidative stress status and beta-endorphin release in active smokers The exhale carbon monoxide (CO) between pre- (oblique line) and post-(no line) intervention periods in each group, control, VC, exercise with VC, and exercise only. Each bar represented the mean and standard deviation, and significant level at p < 0.05 (#).Back to article page