Go mutra Ark is prepared from gomutra ( cow urine), In Ayurveda, Ark can be defined as a liquid preparation obtained by distillation of certain liquids or drugs soaked in water using the Arka-yantra or any convenient modern distillation apparatus. Basically it is distilled Cow urine. Cow urine is extensively used in Ayurveda for treatment of wide range of diseases from Vedic times. Gomutra Ark has Immunomodulatory properties. Immunomodulatory agents are used to either suppress or stimulate the immune responses. It cleanses body. It is not possible to get clean, fresh, cow urine for everyone. In such cases, Gomutra Ark can be used. It is therapeutically effective. Also as Gomutra ark is free from high ammonia content of cow urine it is more palatable, acceptable and lack smell. Unlike the gomutra available in we collect gomutra directly, i.e. we donot let the Cow urine fall on the ground. It is collected in a clean pot and then distilled. The distillation apparatus is a vessel with tight lid and a tube for vapour outlet. The vessel is filled with cow urine and put on fire for heating. The vapours from the vessel are collected in a receiver. This receiving vessel is put in cold water, to condense the vapour. The condensed liquid is Ark.