Kandathipili is a long pepper root have lot of medicinal uses. Kandathipili rasam is made for the ailment of body pain, nausea, general tiredness, bronchitis, cough and cold. This rasam is frequently made for the postpartum delivery meals(pathiya sapadu). It will be available in all south Indian herbals shop. I tried this recipe many times.. but it tastes awesome when i tried it from My Mom's cookbook. I often do this recipe when i feel tired and after a long travel.