The essential oils produced by Muller & Koster stem from carefully researched and selected raw materials throughout the world, depending on their geographical specificity.
The areas of origin of the raw materials are selected also with a keen eye to ensure constant supplies, to produce an essential oil that fully preserves its characteristics over time.
Essential oil: laboratory test
Each essential oil undergoes rigorous laboratory tests to ensure its safety and effectiveness.
It is in our Research and Development laboratory that every fragrance continues its journey to reach the consumer in a perfect status.