Since 1946, Sun Ten Classics has set the standard for modern, science-based manufacturing of traditional Chinese herbal formulas. Founder Dr. Hyong-yen Hsu is known as the ?father of scientific herbal extraction? for his pioneering work developing highly concentrated and pure herbal extracts for clinical use. In 1991, Sun Ten Laboratories opened in Irvine, CA to provide professional quality extracts to practitioners and consumers in the west. Today, Sun Ten continues to use the high potency 5:1 extracts they helped pioneer in their powder, capsule, and tablet formulas.