Cassia Obovata is the hair-conditioning herb that is often marketed as neutral henna. Cassia is not in fact henna, but a herb which can help condition and strengthen hair.  The natural active component in Cassia Obovata is an Anthraquinone derivative named Chrysophanic acid,  with remarkable anti-microbial, anti-fungal and anti-bacterial properties which may be of benefit to those with psoriasis dry, itchy, inflamed and/or scaling scalp conditions. Also  Cassia Obovata can help repair damaged chemically curly hair, making it fuller, glossy and healthier.