With the help of diligent and adept professionals, our organization is prominent Exporter, Distributor, Supplier and Trading Company of Guava Leaves (Dry/Powder) Psidium Guajava in Tuticorin, Tamil Nadu, India. The Health Benefits of Guava Leaf Tea. The young leaves of the guava plant are used in traditional medicine in tropical countries. These leaves contain a number of beneficial substances, including antioxidants like vitamin C and flavonoids such as quercetin.