Found within watermelons, watermelon seeds are generally sweet and non-toxic. Their inherent qualities are thought to clear the lungs, lubricate the intestines, and dissolve phlegm. In South Africa, wild watermelons—dubbed the “South African Treasure”—grow in desert regions; unlike their sweet, succulent counterparts, these wild varieties have pale yellow or green flesh with a bitter taste and an impressive resilience, providing moisture and oil to desert travelers. Oil extracted from these seeds has been validated for its moisturizing and soothing effects.