精油是天然防腐剂有害微生物，如细菌，黴菌和寄生虫散播的速度。已有少数的手作天然保养品会用精油来增强护肤品的抗菌力。
Essential Oils are a natural preservative that prevents the growth of harmful micro-organisms such as bacteria, mold, or parasites. It has been a long practice for homemade skincare makers to use it to keep their skincare and homemade cleansing products as natural as possible.
