An improved method of freeze-drying herbal leaves

Abstract

The present invention provides an improved method of drying herbal leaves that is able to produce high yield of dried leaves with high retention of bioactive compounds at a shorter drying time. In particular, the present invention discloses a method of freeze-drying herbal leaves comprising the steps of cutting the leaves into smaller size, grinding the leaves to form a paste, spreading the paste evenly on a tray to obtain a suitable thickness, forming a plurality of holes throughout the paste and dehydrating the paste in a freeze-drying chamber.