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Preservatives
5
Transcript
WELCOME TO
Who we are?
INTERACTIVE VIDEO SERIES
What are preservatives and are they safe?
Packaged food is a
constant in our lives and forms an
important component of our kitchen.
However, this very food we consume lies around in shops and grocery stores for
weeks and months before it ends up in our mouth. In all these days, it manages to somehow stay fresh and clean and consumable.
This is all because of preservatives.
Preservatives
are substances that help keep the food we consume fresh and doesn't make it go stale.
Food goes stale because of two major reasons:
- oxidation
- microbes.
Oxidation suggests that when the food comes in contact with the atmospheric oxygen it undergoes reactions that turn the food rancid
Microbes present in and around the food eat the nutrients. These are called saprophytic bacteria. The second type of bacteria are the pathogenic bacteria which release toxins and cause many problems once consumed.
Preservatives are of three types
Antimicrobial
These block the growth mechanisms of the bacteria, yeast or moulds.
Antioxidants
These don't allow foods to get oxidised and thus prevent rancidity. Antioxidant preservatives stop the chemical breakdown of food when products are exposed to the air.
Anti-enzymatic
preservatives
These block the enzymatic processes such as ripening occurring in foodstuffs even after harvest.
Sulfites block the growth of microbes by interrupting the normal functioning
of their cells.
Propionates are antimicrobials that help keep bakery products fresh.
Propionic acid occurs naturally in apples, strawberries, grains and cheese.
Benzoates, another weak antimicrobial, fight fungi, working best in areas at a higher pH where there are few bacteria.
Nitrites and nitrates most commonly are used to preserve meats and block the botulism bacteria.
Without preservatives we would be consuming stale and unhealthy food.
However, we should not be consuming too much packaged food as preservatives consumed in excess can cause heart damage, cancer, gut problems and overall disturb the pH of the body.
To know more about our initiative, visit our website:
www.intellify.in
and subscribe to our Youtube channel:
Learn with intellify.
INTELLIFY IS AN EDUCATION INITIATIVE SET UP UNDER SOLVE, ESTABLISHED BY STUDENTS AND ALUMNI OF IIT TO SOLVE THE PROBLEM PLAGUING THE INDIAN EDUCATION SYSTEM.
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