DESC: Ancient Healing - Modern Results Doctors at the A.R.E. Clinic in Phoenix, Arizona use castor oil for virtually every aspect of health. Edgar Cayce recommended castor oil packs over the liver in 545 readings to benefit the liver and digestive system. Healers from many ancient cultures have used castor oil for over 3000 years. In fact in old herbal texts, it is called "Palma Christi," Latin for the palm of Christ. CERTIFIED