Manna Royal Bird's Nest Concentrate is double-boiled from selectively harversted swiftlets' nests from the cave. Royal Bird Nests are rich with glycoprotein which has been found to build and repair body tissues. Prepared using Manna's patented advanced saturated steam methodology, the nutrients and strands are preserved naturally wihtout any preservatives, colouring or stabilizer. Manna Royal Bird Nest Concentrate is the most effective way to enjoy this traditional imperial delicacy.