Bitter Kola (Garcinia Kola) . Garcinia kola or bitter kola is a tree that grows in the rain forests of West Africa. We offer at a very good rate and we strive to satisfy all our buyers with best quality and efficiency. Below is our specification Visible Mould: Non Free From Alatoxine Free From Salmonella Acid Insoluble Ash: 2% max Moisture: 12%max Acid Insoluble Ash: 2% max Caffeine:1.5 % minimum Foreign Matter:1.5%