When sourcing Black Castor Oil, the primary indicator of quality is the extraction method and color. Authentic Jamaican Black Castor Oil (JBCO) is produced by roasting the beans, which creates ash; this ash increases the pH level and alkalinity, making it more effective for hair growth. Ensure the oil is 100% pure, hexane-free, and cold-pressed or traditionally roasted without synthetic additives. Request a Certificate of Analysis (COA) to verify the fatty acid profile, specifically ensuring a Ricinoleic acid content of 85-95%.