Note 16 - Concentrations and Credit Risk: Vendor concentrations table (Details)	9 Months Ended
	Jan. 31, 2014	Jan. 31, 2013
Details
Percent of purchase from Shandong Heze Zhongshun Pharmaceutical - Chinese Medicine	16.70%	38.10%
Percent of purchase from Qufu Longheng Materials - Chinese Medicine	18.70%	34.90%
Percent of purchase from Jiuquan Jiale Biotech Co., Ltd - Stevioside		20.00%
Percent of purchase from Gansu Fanzhi Biology Techonology Co.,Ltd - Chinese Medicine	17.20%
Percent of purchase from Qingdao Runhao Stevia Technology Co., Ltd - Stevioside		13.00%
Total percent of purchase from major suppliers - Chinese Medicine	52.60%	73.00%
Total percent of purchase from major suppliers - Stevioside	0.00%	33.00%