Medically reviewed by William Truswell, MD Argan oil comes from the fruit kernels, or seeds, of the argan tree (Argania spinosa). There are two main types of argan oil: food-grade and cosmetic-grade.

Following is a transcript of the video. Narrator: Argan oil can cost as much as $300 per liter, making it the world's most expensive edible oil. Just 20 years ago, however, the production of argan ...