Natamycin is a safe, efficient and obligate inhibitor used to prevent mold, yeast and other fungus. The minimum effective inhibitory concentration (MIC) is usually 1-15μg / m, far better than other food preservatives. Natamycin is not easy to be absorbed by human and animal digestive tract, so it is very safe to human body. Meanwhile, it does not affect the product flavor (appearance, smell, color and taste), so it can be widely used in food, meat, pastry and fruit juice.

Natamycin is deemed to be a GRAS (Generally Recognized as Safe) substance in USA, and is assigned to be the number E-235 natural preservative in European Union.