The International Certification for Natural Henna Arts (ICNHA) is a peer assessment for henna artists to certify that they use only natural, chemical-free henna and understand the cultural and traditional uses of henna. 

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Certified artists understand the fundamental principles of henna, skin, hygiene, safety, culture, and traditions. This makes the artist more effective at serving diverse clientele safely, effectively, and sensitively. 

-Information from ICNHA