St John Macias healing oil
The St John Macias healing oil is dedicated to the Dominican monk of Lima, Peru. He was born in Ribera, Spain, to a noble family and was orphaned at a young age. John went to Peru to work on a cattle ranch before entering the Dominicans at Lima as a lay brother, assigned to serve as a doorkeeper or porter. He was known for his austerities, miracles, and visions. John cared for all the poor of Lima, dying there on September 16. Pope Paul VI canonized him in 1975.
Tradition of oils
The tradition of anointing with sacred oil is very old indeed. It is used in sacraments and also as a devotional practice. The sick person applies the oil and blesses themselves. As they do so, they are asked to pray to whomever the oil is dedicated to. The Irish blessings oils do not have miraculous power. It is God who has the power to heal. Applying the oil while praying are important ways for us to express our faith in God’s power. Moreover, by doing so we place our trust in God.