"Nia Pure Organic Soursop Leaf Powder is rich in antioxidants and many important nutrients. A tea made from this leaf powder can have a soothing, calming action, but also other health benefits. Soursop, also known as Graviola or Guanabana, is a tropical tree that has been valued for its delicious and nutritious fruit. The leaves have been used by many indigenous cultures and in folk medicine for centuries.