The prime ingredient of FOS Mastiha derives from resin of the Mastiha tree, also known as the crying tree. This rare and natural tree resin is grown and cultivated exclusively in Chios island, unable to take root anywhere else in the world.

The delicate and skillful handiwork of Kentima (the process of making little scars on the mastiha tree with a small iron tool) is an UNESCO recognised 2500 year-old tradition. The resin droplets, known as mastiha tears, are left to slowly seep out of the bark and dry under natural sunlight to form translucent golden crystals. In Autumn, the area around the tree is cleaned, leveled and coated in a fine white soil on which the tears fall and gathered. The tears are sleeved and diligently washed with olive oil soap and rainwater and then cleaned one by one with a knife or a needle, before they undergo a delicate process of distillation.

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