Difference between revisions of "Health-and-Nutrition/C2/Junk-food/English"
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Image: Collage of ill effects of '''junk '''food | Image: Collage of ill effects of '''junk '''food | ||
| − | | In this tutorial we will learn about: | + | | In this tutorial, we will learn about: |
1. Contents of '''junk''' food and | 1. Contents of '''junk''' food and | ||
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| − | | Image: | + | | Image: High calories in junk food |
| − | + | Image: Lack of nutrients | |
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| − | Image: | + | |
| '''Junk '''food are high in calories. | | '''Junk '''food are high in calories. | ||
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They have none or little amounts of '''protein,''' fiber, '''vitamins''' and '''minerals.''' | They have none or little amounts of '''protein,''' fiber, '''vitamins''' and '''minerals.''' | ||
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| − | For example: pizza, burgers, french fries, noodles, puff pastry, samosa, etc. | + | For example: pizza, burgers, french fries, noodles, puff pastry, samosa''', etc. |
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Image: Corn oil and cotton seed oil | Image: Corn oil and cotton seed oil | ||
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| Mostly fried '''junk '''food is prepared using oils containing '''omega 6 '''fatty acid. | | Mostly fried '''junk '''food is prepared using oils containing '''omega 6 '''fatty acid. | ||
Latest revision as of 17:36, 9 May 2020
| Slide 1
Title Slide |
Welcome to the spoken tutorial on junk food. |
| Image: Collage of content of junk food
Image: Collage of ill effects of junk food |
In this tutorial, we will learn about:
1. Contents of junk food and 2. Harmful effects of junk food on our body |
|
Image: Collage of ingredients Image: Collage of method of frying and baking Image: Nutrients |
Any food can be considered as junk food depending upon three factors.
|
| Image: Collage of sugar, salt, oil, refined flour | Junk food contains a high amount of sugar, salt, refined fat and refined flour. |
| Image: Collage of colored junk food | Most of the junk food is usually prepared by frying or baking.
|
| Image: High calories in junk food
Image: Lack of nutrients |
Junk food are high in calories.
They have none or little amounts of protein, fiber, vitamins and minerals. |
| Image: Collage of deep fried junk food
Image: Collage of fast food
|
A few commonly consumed junk food are deep fried salty snacks.
|
| Image: Collage of beverages | Some beverages are considered as junk food.
|
| Image: Collage of sweets, jams, jellies and sauces
Image: Collage of biscuits, cake, chocolate, ice cream, candy |
Sweets, deep fried sweets, jams, jellies, sauces, ketchups are also junk food.
Biscuit, cake, chocolate, candy, ice cream are other examples. |
| GIF: Rise in blood sugar due to sweet junk food
GIF: Pancreas secreting insulin GIF: Glucose picked up by body cells with the help of insulin Image: Body getting energy Image: Fat getting stored in body |
Let us now see the effect of junk food on our body.
Junk food which is high in sugar causes immediate rise in blood sugar levels. As a result, the pancreas releases insulin in our blood. Insulin is a hormone which acts like a key to open the cells. The cells absorb sugar from the blood to provide us energy. Excess sugar gets stored as fat in the body. |
| GIF: Insulin resistance
GIF: Rise in insulin and blood sugar levels |
Regular eating of high sugar food can cause insulin resistance. During insulin resistance, the body is unable to respond to insulin or use it. Therefore, sugar is not taken up by our cells from the blood. As a result, there is a rise in insulin levels and blood sugar levels. |
| Image: Vicious cycle of overeating and insulin resistance
|
The high insulin levels send signals for hunger to the brain. The body starts craving more food even if it is not hungry. This creates a vicious cycle and causes overeating. |
| Image: Eating one ladoo
Image: Finishing the entire plate of ladoo Image: Hunger signals to the brain |
Let us understand this with an example.
While eating a biscuit or ladoo, we can't restrict ourselves to one piece. We crave to eat it more and more. We mostly finish the entire packet of biscuits or many ladoos at a time. This is because of the hunger signals which are sent to the brain. |
| Image: Sugar and blood pressure
GIF: Increase in sodium levels Image: Puffed hands and feet |
Sugar also has an effect on blood pressure.
On eating food high in sugar and salt, our sodium level increases. Sugar enhances the sodium absorption in the body by the kidney. As a result, sodium gets retained in the body. This causes an increase in blood pressure and water retention in the body. As a result, puffiness in hands and feet can be seen. |
| Image: Eating chips and signal for thirst
GIF: Increase in sodium in our blood Image: Brain giving signals for water |
Let me give you another example.
After eating chips we usually feel thirsty. This is because sodium levels in our blood increases on eating salty food. The brain then sends signals of thirst so that we drink more water. |
| Image: Water diluting sodium levels
Image: Drinking cold drink or juice GIF: Increase in blood sugar levels Image: Increased sodium absorption in kidney Image: Rise in blood pressure |
Drinking water will dilute the sodium levels in the body.
But, drinking juice or cold drinks will increase the sugar levels in the body. This will result in a rise in the blood pressure. |
| Image: Sugar, salt and refined flour
Image: Wheat refined flour Image: Lack of nutrients |
Apart from sugar and salt, most junk food have a lot of refined flour.
Refined wheat flour is most commonly used. These refined flours are low in fiber and lack essential nutrients. |
| Image: Stomach filled fibrous food
Image: Slow digestion Image: Stomach filled with oil and sugar Image: Fast digestion |
Fiber has a very important role in the body.
It gets digested slowly and gives us a feeling of fullness for a long time. Therefore, when we eat junk food low in fiber it gets quickly digested. Our stomach gets empty very quickly and we feel hungry again. |
| Image: Gut comprising of both good and bad bacteria
Image: Fiber rich food and More good bacteria in the intestine Image: Collage of immunity, healthy skin and reduced inflammation |
Another important benefit of fiber is to maintain a healthy gut.
Our gut comprises of both good and bad bacteria. Fiber promotes the growth of good bacteria. Thereby, helping in proper digestion and absorption of nutrients. Other benefits are strong immunity, healthy skin and reduced inflammation. |
| GIF: Passage of soft and bulky stool in the intestine easily
Image: Constipation |
Fiber is also necessary for our stools to absorb water.
This makes the stools soft and bulky. Thus, the stool moves easily through the intestine. Since junk food is low in fiber, eating it regularly can cause constipation. |
| Image: junk food with Less good bacteria
Image: Inflammation in body Image: Collage of various diseases |
The other disadvantage is that junk food reduces the good bacteria in the gut.
This increases inflammation and the risk of various diseases. |
| Image: Unhealthy fats
|
Some junk food are high in refined fats like trans-fat.
Cakes, biscuits, baked products, margarines, vanaspati all have trans-fat. |
| Image: Rise in unhealthy cholesterol and decrease in good cholesterol
GIF: Cholesterol in blood Image: Collage of brain, skin, and heart Image: Bad cholesterol and diseases |
Trans-fat raises the level of bad cholesterol and lowers good cholesterol.
Cholesterol is a type of fat found in our blood. Good cholesterol helps in proper working of the brain, skin and heart. But, excess of bad cholesterol is not good for our health. |
| Image: Collage of different oils
Image: Sunflower oil, safflower oil, soybean oil Image: Corn oil and cotton seed oil |
Mostly fried junk food is prepared using oils containing omega 6 fatty acid.
Examples are sunflower oil, safflower oil, soybean oil. Even corn oil and cottonseed oil are included. |
| Image: Rise in bad cholesterol
Image: Deposition of cholesterol on blood vessels |
The omega 6 in these oils raises the level of bad cholesterol in our body.
Excess of bad cholesterol gets deposited on the walls of our blood vessels. |
| Image: Inflammation caused by Omega 6 oils
Image: insulin resistance and heart diseases |
Excess of omega 6 fatty acid also enhances inflammation in the body.
This results in the development of insulin resistance and heart diseases. |
| Image: Collage of obesity, blood pressure and diabetes
Image: Fat deposition Image: Damaged heart |
Excessive consumption of junk food has many harmful effects.
Obesity, high blood pressure, diabetes are the most common. They can also cause a risk of increased bad cholesterol and heart diseases. |
| Image: Sleep disturbances
Image: Cyst on ovaries |
Sleep disturbances or development of cysts in the ovaries can also happen. |
| Image: Child holding stomach
Image: Child vomiting and refusing to eat |
Eating too much junk food can upset the stomach.
You may experience nausea, vomiting and reduced appetite. |
| Image: Collage of dental caries, itching reaction, cancer | Other effects of junk food are dental caries, allergies and cancer. |
| Image: Lack of nutrients
Image: Poor immune system Image: Feeling tired and sleepy |
Junk food lacks the necessary nutrients to keep our body healthy.
Therefore, eating too much junk food can weaken our immune system. Due to which we may often feel tired and weak. |
| Image: Collage of ill effects of junk food
Image: A child eating lots of junk food |
Usually, we are not aware about the ill effects of junk food on our health.
Without giving a thought we eat them regularly in large amounts. |
| Image: Choosing our food | Therefore, we should be careful about choosing our food so that we stay healthy. |
| Acknowledgement Slide | This brings us to the end of the tutorial.
Thank you for joining. |
