Do you buy frankincense essential oil or incense? Frankincense is one of the oldest luxury goods on Earth and has been used for thousands of years. But new research suggests that it won’t be around forever. Frankincense comes from trees and shrubs, but most trees are old and dying, and the young saplings are being eaten by wandering grazing livestock or burned by farmers wanting to use the land for agriculture. Right now, the old tree population isn’t being replaced fast enough. If you buy frankincense, it’s important to buy sustainably sourced products.