Conservante

Preservatives are used to prevent decomposition or unwanted chemical changes. They can be natural, like sugar and salt for food preservation, or synthetic, extending the shelf life of medicines and biological samples.

What are the two main types of preservatives mentioned in the text?

How do natural preservatives differ from synthetic preservatives?

What role do preservatives play in food and medicine?

Can you provide examples of natural preservatives mentioned in the text?

What is the significance of extending the shelf life of biological samples?