Preservatives are added to food and beverages to increase the shelf life of the product. Here we include microbial preservatives sometimes called anti microbial. These are products that inhibit or slow down the growth of certain microbial spoilage organisms. Foods and beverages are manufactured to high standards and are packed with minimal presence of spoilage organisms. However to ensure shelf life most processed foods and beverages include at least one preservative, often more than one to increase the range of action across the spectrum. Preservatives can be synthetically produced or naturally extracted.