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Salacia chinensis L. - syn.Salacia prinoides (Willd.)DC.; Tontelea prinoides Willd. - Celastraceae
五层龙 wu ceng long (chin.)
Climbing shrub, to 4m tall, native to Southeast Asia; leaves elliptic to (ob)ovate, leathery; flowers tiny; fruit a globose red berry. „The roots of this species have medicinal uses, including normalizing menstruation and invigorating circulation.“
http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=220011886
The methanolic root extract contains mangiferin, which acts antidiabetic: „… mangiferin treated diabetic rats
significantly decreased the level of blood glucose, glycosylated hemoglobin as well as increased level of insulin and hemoglobin… The antidiabetic effect of mangiferin was compared with standard antidiabetic drug glibenclamide… The oral glucose tolerance test showed that the mangiferin gave definite lower blood glucose level at the end of 60 min after glucose loaded and even lower level at end of 120 min. The mangiferin enhanced glucose utilization, so the blood glucose level was significantly decreased in glucose-loaded rats.“
[Antihyperglycemic effect of mangiferin in streptozotocin induced diabetic rats., Sellamuthu, P.S., Muniappan, B.P., Perumal, S.M., Kandasamy, M., Journal of Health science, Vol.55(2), 2009, 206-214]
http://jhs.pharm.or.jp/data/55%282%29/55_206.pdf