Angelicae gigantis Radix (dried root of Angelica gigas) is one of most popular herbal medicines in East Asia.Major bioactive ingredients such as decursin and decursinol angelate in the Angelicae gigantis Radix provides several healthy benefits including antibacterial and antitumor effects.Recent studies have shown that ultrafine or nanosized powders of herbal medicines provide better physical properties and biological activities.However,small-sized Angelicae gigantis Radix powders are easily deteriorated due to the increased surface area which offers increased reactivity.The ultrafine powder should be protected from the environments such as oxygen,light,and moisture.Microencapsulation protects Angelicae gigantis Radix particles from deterioration by exterior environmental conditions.