• The life of bacteria or fungi actually grow in lipstick slowly because usually lipstick in anhydrous form.

• However, if this product is used on the lips after drinking sweet beverage then there is the possibility of contaminated surface can be so easily covered with microorganisms.

• Therefore, it is recommended that a small amount of preservative included in the formulation.

• Preservatives in higher concentrations can cause a sensation of heat and allergic reaction. There are few are preserving agents (phenoxyethanol mainly) in anhydours Such products as lipsticks.

• Example: methyl paraben, propyl paraben and fenoxyethanol with concentrations from 0.05 to 0.20%.