Horsetail and Diabetes

I found the information below about how horsetail may help the condition of diabetes.

Diabetes: A single oral administration of a water extract of Equisetum myriochaetum at doses of 7 & 13 mg/kg, of butanol extract (BE) at doses of 8 & 16 mg/kg, significantly lowered plasma glucose levels in streptozotocin-induced diabetic rats within 3 hours of administration. Three kaempferol glucosides & 1 caffeoyl glucoside were isolated from drug & were shown to be main constituents in both extracts.

A single dose of a water extract of Equisetum myriochaetum was administered orally in 11 recently diagnosed type 2 diabetic patients. Glucose & insulin were measured at 0, 30, 60, 90, 120 & 180 min after administration. The same patients served as the control group  received only colored water as placebo.

The administration of extract was shown to significantly reduce blood glucose levels of type 2 diabetic patients within 90, 120 & 180 min. There were no significant changes in insulin levels.