Compare between natural preservatives and chemical preservatives by two points
Answers
Answer:
natural preservatives
- it cannot harm human health
- it is natural and suitable for environment
chemical preservatives
- it can harm human health
- it also affect environment
Answer:
Natural Food Preservatives
In the category of natural food preservatives comes the salt, sugar, alcohol, vinegar etc. These are the traditional preservatives in food that are also used at home while making pickles, jams and juices etc. Also the freezing, boiling, smoking, salting are considered to be the natural ways of preserving food. Coffee powder and soup are dehydrated and freeze-dried for preservation. In this section the citrus food preservatives like citrus acid and ascorbic acid work on enzymes and disrupt their metabolism leading to the preservation.
Sugar and salt are the earliest natural food preservatives that very efficiently drops the growth of bacteria in food. To preserve meat and fish, salt is still used as a natural food preservative.
Chemical Food Preservative
Chemical food preservatives are also being used for quite some time now. They seem to be the best and the most effective for a longer shelf life and are generally fool proof for the preservation purpose. Examples of chemical food preservatives are:
Benzoates (such as sodium benzoate, benzoic acid)
Nitrites (such as sodium nitrite)
Sulphites (such as sulphur dioxide)
Sorbates (such as sodium sorbate, potassium sorbate
Antioxidants are also the chemical food preservatives that act as free radical scavengers.