Table 4. Zeta Potential Measurements of Saponins from Different Sources.

saponin sources	zeta potential (mV)	ref
Quillaja	–40 to −60	(16), (77)
Yucca	–25 to −27	(16)
Ginseng	–41 to −57	(17), (90)
Tea	–50 to −54	(15)
Glycyrrhizin	–36 to −50	(20)
Red beet	–39 to −60	(22)
Argan subproduct	–40 to −55	(69)
Oat bran	–50 to −60	(23)