Table 2.

Human studies.

Author (Year)	Subjects	Intervention	Primary Outcome	Results
R.J. Bloomer (2005)	Resistance-trained males	4 mg/d, 3 weeks	Muscle performance	No difference [59]
C. P. Earnest (2011)	Amateur endurance-trained males	4 mg/d, 4 weeks	TT performance	Improved performance [62]
B. Djordjevic (2012)	Male elite soccer players	4 mg/d, 12 weeks	Redox status	Stress oxidative prevention [64]
P.T. Res (2012)	Well-trained male cyclists or triathletes	20 mg/d, 4 weeks	TT performance	No effect [60]
L.J.J. Klinkenberg (2013)	Well-trained male cyclists	20 mg/d, 4 weeks	Redox status	No effect [61]
D.R. Brown (2021)	Trained male cyclists	12 mg/d, 1 weeks	TT performance	Improved performance [63]

TT = time trial.