When sourcing Tea Tree Handmade Soap, prioritize products that use 100% pure Melaleuca Alternifolia (Tea Tree) essential oil rather than synthetic fragrances. The soap base should ideally consist of natural vegetable oils such as olive oil, coconut oil, or shea butter. Ensure the pH level is between 7 and 9 to maintain skin barrier integrity. For 'handmade' verification, look for the Cold Process (CP) method, which preserves the therapeutic properties of the essential oils better than melt-and-pour methods.