All our products are made 100% natural herbs, and they are manufactured from FDA Registered manufacture in the U.S. where it meets the standard of GMP (Good Manufacture Practice).  All herbs are verified to be safe for ingestion according to the list of FDA GRAS (Generally Regarded As Safe) List and HOC.  Our manufacturers are committed to provide the highest quality and  latest technology that ensures the safety of the products.  More importantly, each formula is made according to the Principle of Eastern Medicine that has been passed down for centuries through the practitioners.