Poolangilangu or Kichali kilangu is a plant of Turmeric family grows well in hill areas. Its roots are dried well, ground well, and the powder is then filtered to make it free from unground particles. Then it is made available online in powder form. It is having a very good fragrance as the natural plant. 

Disclaimer: Before taking any herbal as an intake, you are requested to consult with a Siddha or Ayurveda Doctor or any other Traditional Siddha Physician to avoid further health related problems. They will help you to understand the procedure, the effect of Herbals and foods to avoid if any, upon consuming the herbs.