Table 2.

Characteristics of participants and supplementation protocols of the selected studies.

Characteristics	Types	Study
Participants	Elite athletes	[12,14,23]
	Well-trained athletes	[15,22]
	No regular training before the study	[17,24]
Supplementation product	Manufactured	[17,24]
	Registered product®	[12,14,15,22,23]
% Saponins of the supplementation product	100%	[22,23,24]
	60%	[14]
	>40%	[15,17]
	40%	[12]
Total dose (mg) × day−1	1875	[22]
	1800–2700	[23]
	1250	[12]
	900–1800	[24]
	770	[15]
	500	[17]
	450	[14]
Duration	12 weeks	[24]
	6 weeks	[15]
	5 weeks	[14]
	4 weeks	[23]
	3 weeks–4 weeks (rest)–3 weeks	[12]
	2 weeks	[17]
	20 days	[22]
Dose schedule	After exercise and before going to sleep	[23]
	a.m.	[12]
	a.m. and before going to sleep	[24]
	a.m. and p.m.	[17,22]
	No reported	[14,15]

Abbreviations: a.m. = ante meridiem; p.m. = post meridiem.