The leaves of the Annona muricata (soursop tree) are used as a herbal tea called soursop tea or Graviola tea. It is caffeine-free and sometimes combined with other ingredients such as soursop fruit and matcha. Soursop tea protects heart health, aids in digestion and boosts circulation. The fruit is also rich in antioxidants, vitamins A, B, and C, and iron.