Palo Santo means holy wood, and it is burnt more often than it is worn. The wood has to lie dead on the forest floor for years before it is worth distilling. The oil is about 60% limonene, which is why a wood smells faintly of citrus.^[1] Reviews of limonene find it calms inflammation in the airways.^[2] That is about the compound, not trials of this oil, which is bought mostly for ritual and for its smell.