Essential oils and finished perfume oils are not the same thing.
Some people use certain essential oils as materials when experimenting with fragrance, but that does not mean every essential oil should simply be applied directly to skin or treated as a finished perfume.
Usage level, intended application and ingredient-specific safety all matter.
FDA also notes that products marketed as essential oils can fall under different regulatory categories depending on their intended use and the claims made for them.
Lily Essences does not sell essential oils or raw perfume-making materials.
The collection consists of finished roll-on fragrances designed for personal fragrance use.
So if you are shopping Lily Essences, there is nothing for you to formulate.
Choose your scent, roll it on, and enjoy it.