you also can try to find it in COSTCO, it should be cheap in there. Do you know OPC(Grape seed)? It's very good too. My Auntie has been eating it for couple of years in USA. In costco, grade seed is $12--$18 a bottle (150 pills)
Thank you all!!! I saw it is Chinatown, 12.99 and Pharmarix, similar price, but just for half month quantity. I will try to see Cosco or Walmart. My brother in law told me just US$5 for 100 pills, which is for 1 month.