A Preservative is a natural or synthetic ingredient that is added to products such as foods, pharmaceuticals and personal care products to prevent spoilage, whether from microbial growth or undesirable chemical changes. Preservatives extends the shelf -life of products. In addition, preservatives expires just like any ingredient. It loses it potency and strength
The use of preservatives is essential in most products to prevent product damage caused by microorganisms and to protect the product from inadvertent contamination by the consumer during use. An ingredient that protects the product from the growth of microorganisms is called an antimicrobial. A preservative may also be added to a product to protect it against damage and degradation caused by exposure to oxygen, and in this instance, these ingredients are also called antioxidants. Without preservatives, cosmetic products, just like food, can become contaminated, leading to product spoilage and possibly irritation or infections. Microbial contamination of products, especially those used around the eyes and on the skin, can cause significant problems. Preservatives help prevent such problems.