assignment on vitamins ppt

Mar 23, 2019

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Vitamins. Brought to you by the Flintstones. C.5.1 Define the term vitamin. So, what exactly is a vitamin?. Here’s the technical definition: An organic molecule that is required in only trace amounts and can only be obtained through the diet since it cannot be synthesized.

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• water soluble
• fat soluble
• fat soluble vitamins
• rhodopsin light sensitive material

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Vitamins Brought to you by the Flintstones

C.5.1 Define the term vitamin.

So, what exactly is a vitamin? • Here’s the technical definition: An organic molecule that is required in only trace amounts and can only be obtained through the diet since it cannot be synthesized.

In other words… • Vitamins are “Vital amines” that we need to survive, but can’t make ourselves. • Most vitamins are coenzymes or are precursors to coenzymes, and many are antioxidants. • Your body can’t differentiate between synthetic and natural vitamins. • Fun Fact: 1g of B12 is enough for 500,000 people! Crazy right??

C.5.2 Deduce whether a vitamin is water or fat soluble from its structure.

Water Soluble Vitamins • There are nine total water soluble vitamins. and are found in aqueous environments inside cells, where most are needed as components of coenzymes. • Excess of these vitamins is excreted by urine, so it needs to be constantly replenished in small amounts. • These are carried by the blood-stream.

How do you recognize them? • Water soluble vitamins all have –OH, -COOH or other polar groups to make them water soluble. (more on this later…) • Example: Vitamin C and Vitamin B

Fun Fact • Ever wondered where the names B and C came from? They are the names of the test tubes where the vitamins were first recognized. Scientists later realized that test tube contained more than one type of vitamin, which resulted in vitamins B1, B6, B12 etc.

Fat Soluble Vitamins • These are stored in the body’s fat deposits and cell membranes. • Because they are not continuously excreted by the body, excess of fat soluble vitamins is more hazardous than water soluble since they can accumulate in body fats. • None has been identified as a coenzyme.

What do they look like? • The structures of fat soluble vitamins are more hydrocarbon-like and have less functional groups. • Nonpolar • Examples: Vitamins A, D, E & K

C.5.3 Describe the structures and major functions of retinol (vitamin A), calciferol (vitamin D) and ascorbic acid (vitamin C)

Retinol/Vitamin A • Fat Soluble • It has 3 active forms: retinol, retinal, and retinoic acid • It is produced by cleavage of (b) carotene (this is the molecule that gives carrots their orange color), so it is required for the synthesis of visual pigments • It is an antioxidant! How does it work? • Hint: Look at the functional groups at the end of each hydrocarbon chain...more to come!

What is Vitamin A used for? • It is essential for night vision (particularly rhodopsin), healthy eyes, normal development of epithelial tissues, formation of bone, reproduction and more! • Required for the production of rhodopsin (light-sensitive material in the rods of the retina). • Rhodopsin: a pigment of the retina that is responsible for both the formation of the photoreceptor cells and the first events in the perception of light.

Forms of Vitamin A http://www.vivo.colostate.edu/hbooks/pathphys/misc_topics/vitamina.gif

Vitamin A Deficiency • Deficiency can cause night blindness and xerophthalmia. • Xerophthalmia: is a medical condition in which the eye fails to produce tears; it may be caused due to a lack of vitamin A • Macular degeneration: a medical condition in which the light sensing cells in the macula (part of the retina) malfunction and, over time, cease to work (blindness).

Xerophthalmia http://www.milesresearch.com/eerf/images/xerophthalmia1.jpg http://www.milesresearch.com/eerf/images/bitot-step0.jpg

Calciferol/Vitamin D • Fat Soluble • It is related in structure to cholesterol. • It is synthesized when UV light from the sun strikes a cholesterol derivative in the skin. • In your kidney, vitamin D is converted to a hormone which regulates calcium absorption and bone formation.

Vitamin D Structure

Function and Deficiency of Vitamin D • Required for the uptake of calcium from food. Deficiency can cause weak bones (rickets). • Rickets: softening of the bones in children potentially leading to fractures and deformity; results from severe malnutrition and is predominant in developing countries • Osteomalacia is used to describe a similar condition occurring in adults. • Sufficient vitamin D levels can also be achieved through dietary supplementation. • Most dermatologists recommend vitamin D supplementation as an alternative to unprotected UV exposure due to the increased risk of skin cancer associated with sun exposure.

Rickets http://www.dinf.ne.jp/doc/english/global/david/dwe002/dwe002g/dwe00215g01.gif http://www.e-radiography.net/radpath/r/Rickets_wrist_healing.jpg

Ascorbic Acid/Vitamin C • Water Soluble • It is biologically active without any change in structure from the form it has in food. • It has been proven to be a valuable anti-oxidant (you will get to see this for yourself today!) • We are one of the few species that obtain it from our diet, most others synthesize it from glucose.

Structure of Vitamin C

Function of Vitamin C • Its most characteristic role is to function as a co-substrate in the formation of structural collagen • It makes up much of skin, ligaments, tendons, and also serves as matrix on which bone and teeth are formed.

What is Collagen? • Collagen is the main protein of connective tissue in animals and the most abundant protein in mammals, making up about 25% of the total protein content. • Fibrous structural protein • Bundles of collagen are called collagen fibers • Support most tissues • Gives cells structure inside and out • Main component of cartilage, ligaments, tendons, bone, teeth • Responsible for skin strength and elasticity

Collagen http://www.3dchem.com/imagesofmolecules/Collagen2.jpg

Deficiency of Vitamin C • Deficiency can cause scorbutus (scurvy). • Scurvy leads to the formation of liver spots on the skin, spongy gums, and bleeding from all mucous membranes.

Scurvy http://www.med.uc.edu/departme/cellbiol/Image7.gif http://www.faqs.org/nutrition/images/nwaz_02_img0214.jpg

Antioxidants and Preservatives • A substance that prevents oxidation by reacting w/ an oxidizing agent and gets oxidized itself. • Many foods get spoiled because they get oxidized, so they are protected by “phenolic” additives. • A naturally occurring phenolic antioxidant is vitamin E.

Antioxidants Continued… • Rancidity: it is when fats and oils develop an odor/flavor upon exposure to moist air, which is the result of the oxidation of the carbon-carbon double bonds in the fatty acid chains in the tri-glycerols. • So, antioxidants prevent rancidity in foods by preventing them from getting oxidized, by getting oxidized themselves. • Our principal dietary antioxidants are vitamins C, E, B, and selenium. These work by defusing the potentially harmful free radicals in the body

C.5.4 Describe the effects of food processing on the vitamin content of food.

Effects of Cooking on Vitamin Contents • Vitamins containing carbon-carbon double bonds and hydroxyl groups are easily oxidized and thus can be destroyed by prolonged cooking and high temperatures (which speeds up oxidation).

Vitamin C • Vitamin C is water soluble and readily oxidized. So boiling vegetables can deplete a lot of Vitamin C content. • Scurvy, from lack of vitamin C, was common in sailors because they spent long periods without fresh foods. • Solutions: • Keeping food refrigerated can slow the oxidation process. • Steaming foods instead of boiling

Vitamin C Oxidation http://online.redwoods.cc.ca.us/depts/science/chem/chem1A/Labs/VitaminC/VitaminC.gif

Other Vitamins • Vitamin D can be destroyed through oxidation by some bleaching agents used in manufacturing purified flour. • Vitamin A is not readily broken down by cooking.

Genetic Modification • Does not lower nutrition value/destroy vitamins • Increases food productivity • Food more resistant to disease/toxins • Better flavor texture, nutritional value and shelf life • May contaminate DNA or increase risk of a disease- long term effects are unknown

Genetically Modified Tomato

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Chapter 8: Vitamins and Minerals

Define the Following Terms:

• 1. antioxidants—substances that protect body cells and the immune system from damage by harmful chemicals in air and foods.
• 2. electrolyte minerals—sodium, chloride, and potassium, which control and balance fluid flow in and out of cells.
• 3. fat-soluble vitamins—vitamins absorbed and transported by fat.
• 4. free-radicals—harmful by-product excreted when cells burn oxygen to produce energy.
• 5. hypertension—high-blood pressure linked to high salt intake.
• 6. iron-deficiency anemia—lack of enough iron in the body, resulting in fatigue, weakness, and shortness of breath.
• 7. major minerals—macrominerals with special duties in the body; calcium, phosphorus, magnesium, sodium, chloride, and potassium.
• 8. osteomalacia—a disease caused by a lack of vitamin D in adults.
• 9. osteoporosis—condition caused by calcium deficiency; bones become porous, weak, fragile.
• 10. pica—Condition linked to iron deficiency; causes unusual appetite for ice, clay, and other nonfood items.
• 11. toxicity—excessive amount of substance that reacts as poison in the body.
• 12. trace minerals—minerals needed in only small amounts but serving vital body functions.
• 13. water-soluble vitamins—vitamins dissolve in water and pass easily into the bloodstream during digestion.

Answer the following questions:�

• 1. Why are vitamins and minerals called micronutrients?
• They are needed in smaller amounts than other nutrients.

2. Why are some vitamins considered to be antioxidants?

• They protect body cells and the immune system by either transforming harmful free radicals into less damaging compounds or repairing damaged cells.

3. Compare water-soluble and fat-soluble vitamins.

• Water-soluble vitamins dissolve in water and are carried in the bloodstream; they are not stored, and excess amounts are eliminated with waste products. Fat-soluble vitamins are absorbed and transported by fat; excess amounts are stored by the body for later use.

4. What does vitamin C do for you?

• Helps maintain healthy capillaries, bones, skin, and teeth. Helps your body heal wounds and resist infections. Aids in the absorption of iron and works as an antioxidant. Plays a role in caring for collagen that gives structure to bones, cartilage, muscle, and blood vessels.

5. One family stored milk in small, clear containers. What do you think of this practice?

• Not good because light through the containers will destroy riboflavin in the milk.

6. What function in the body do riboflavin, niacin, vitamin B6, vitamin B12, vitamin B5, and biotin have in common?

• They are all involved in using carbohydrates, proteins, and fats.

7. Why is folate a very important vitamin?

• It helps the body use proteins, builds red blood cells, and forms genetic material. It prevents birth defects that damage the brain and spinal cord.

8. What can occur with vitamin A deficiency?

• Rough, scaly skin and infections in the respiratory tract and other areas of the body; causes night blindness and total blindness in many children in developing countries.

9. What is toxicity?�

• An excessive amount of a substance that is poisonous in the body.

� 10. What are two ways to get vitamin D?

• Through exposure to sunlight and in fortified milk.

11. Why do cooks need to pay particular attention to the ways that foods are prepared?

• Some cooking techniques can destroy certain vitamins.

12. Compare major and trace minerals.

• The amount of trace minerals the body needs is much smaller than the amount of major minerals needed.

13. Why do teens need to think about osteoporosis?

• Bone mass builds u p during childhood, the teen years, and young adulthood, so care taken to consume calcium during early life can prevent the disease from developing later.

14. Why are sodium, chloride, and potassium called electrolyte minerals?

• They form chemical particles called electrolytes, which attract fluids. Cells move electrolytes through cell walls as needed to balance fluids and keep cells from collapsing or bursting.

15. What can help reduce hypertension?

• Lowering intake of table salt.

16. What are some signs of iron-deficiency anemia?

• Being tired, weak, short of breath, pale, and cold.

17. One teen chewed on ice to the point that her friends noticed and commented on the frequency. What might be wrong?

• She might have pica, an unusual appetite for ice, clay, or other nonfood items, indicating an iron deficiency.

18. Why is fluoride needed in the diet?

• To prevent tooth decay and strengthen bones.

19. What do you think about the trend to fortify many food products with vitamins and minerals?

• Might help some people, but also has the potential to cause toxic excesses

How does your diet rate?

Balanced Diet = Good Health

Want to create or adapt books like this? Learn more about how Pressbooks supports open publishing practices.

10.1 – Introduction to Vitamins

Learning objectives.

• Define the term vitamin.
• Compare and contrast fat-and water-soluble vitamins and identify vitamins that fit in each category.

To combat this issue the Island Food Community of Pohnpei has been instrumental in promoting the citizens of Pohnpei to increase local karat banana consumption. The karat banana is rich in beta-carotene (a source of vitamin A) and increasing consumption among the locals will decrease the prevalence of vitamin A deficiencies in Pohnpei. For further information on this issue visit the Island Food Community of Pohnpei’s website and watch this video .

Vitamins are organic compounds that are traditionally assigned to two groups fat-soluble(hydrophobic) or water-soluble (hydrophilic). This classification determines where they act in the body. Water-soluble vitamins act in the cytosol of cells or in extracellular fluids such as blood; fat-soluble vitamins are largely responsible for protecting cell membranes from free radical damage. The body can synthesize some vitamins, but others must be obtained from the diet.

One major difference between fat-soluble vitamins and water-soluble vitamins is the way they are absorbed in the body. Vitamins are absorbed primarily in the small intestine and their bioavailability is dependent on the quality of the diet. Including a small amount of fat or oils in your meal enhances fat-soluble vitamin absorption.  Once fat-soluble vitamins have been absorbed in the small intestine, they are packaged and incorporated into chylomicrons along with other fatty acids and transported in the lymphatic system to the liver. Water-soluble vitamins, on the other hand, are absorbed in the small intestine but are transported to the liver through blood vessels. (Figure 10.1.3 ).

1 Yamamura CM, Sullivan KM. Risk factors for vitamin A deficiency among preschool-aged children in Pohnpei, Federated States of Micronesia . J Trop Pediatr. 2004; 50(1),16-9. https://www.ncbi.nlm.nih.gov/pubmed/14984164. Accessed May 23, 2019.

key Takeaways

• Vitamins are organic compounds that are traditionally assigned to two groups fat-soluble(hydrophobic) or water-soluble (hydrophilic).
• Water-soluble vitamins act in the cytosol of cells or in extracellular fluids such as blood; fat-soluble vitamins are largely responsible for protecting cell membranes from free radical damage. The body can synthesize some vitamins, but others must be obtained from the diet.
• The fat-soluble vitamins include vitamins A, D, E, K. The water-soluble vitamins include the B vitamins and vitamin C.

Contributors

University of Hawai’i at Mānoa Food Science and Human Nutrition Program: Allison Calabrese, Cheryl Gibby, Billy Meinke, Marie Kainoa Fialkowski Revilla, and Alan Titchenal

Nutrition 100 Nutritional Applications for a Healthy Lifestyle Copyright © by Lynn Klees and Alison Borkowska is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License , except where otherwise noted.

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Vitamins - PowerPoint PPT Presentation

Vitamins Goals -To give students information about vitamins so they can eat healthy foods-For students to know which foods have a lot of vitamins – PowerPoint PPT presentation

• -To give students information about vitamins so they can eat healthy foods
• -For students to know which foods have a lot of vitamins
• By the end of the lesson students should be able to
• name the vitamins A, B, C, D
• talk about which vitamins are contained in different healthy foods
• answer the questions given at the end of the lesson accurately in their journals
• talk about which vitamins are in their own diet
• Pictures of food items, vegetables, fruits
• Text about vitamins
• Diagram about vitamins, where they are found, what they are useful for, how they are used and what happens when someone is deficient.
• Letter cards spelling out the word vitamins
• Activity II Wh questions? Two s-s ask questions? What is this? Is this a juice? What kind of vegetables do you know? What do you know about vitamin D?
• Students will answer Yes/ No questions.
• Presentations
• Deficiency -???????
• Smooth - ???????
• Fatigue - ?????????
• Nerve damage -??????? ???????????
• Sensitive skin - ?????? ????
• Osteoporosis ??????????
• Swollen gum - ??????? ?????
• Vitamin - ??????? ?????
• Reproduction - ???????????
• A smooth tongue
• Sensitive skin
• Poor growth
• Problem with reproduction
• Osteoporosis
• Loose teeth
• Swollen gums
• Students read the text, than in small group they will discuss about USEAGE, DEFICIENCIES, FOUND in, USED for. Make notes for your self.
• Write and read about their own diet breakfast, lunch and dinner then share with your pair.
• Write a Cinquaine poem Vitamins.
• Vitamins play a very important role in human health. Over dosage of some vitamins may be harmful, so people must take normal doses of vitamins.
• When the winter months come your food becomes rather poor of vitamins.
• Winter is the time for virus infections, colds and flu and your resistance is especially jow. Take vitamins A, D, C every day.
• They are often called winter vitamins.
• Line 1 noun
• Line 2 2 adjectives that describe the noun
• Line 3 3 verbs that describe the noun
• Line 4 One complete, related sentence
• Line 5 Noun-synonym of the noun in line 1.
• Useful, soluble
• Help, protect, keep
• It is impotant for heath
• Essay Healthy Foods.

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• Biology Article

Vitamins And Minerals

Vitamins and minerals are both essential nutrients which are required in a daily diet. Altogether, there are 13 essential vitamins and many minerals which are required for the body to function properly and to maintain the optimal health. Both vitamins and minerals combine to perform hundreds of roles in the body.

Let us learn in detail about these vitamins and minerals below.

Also Read:  Difference between Vitamins and Minerals

Vitamins are organic compounds, found in natural foods which are required for normal growth and maintenance of the body. Both humans and animals require vitamins for their growth.

The word vitamin is a combination of Latin words “vita” and “amine” which means life and nitrogen respectively. Casimir Funk discovered a substance that helps in the growth and maintenance of the body and named it in 1884.

Vitamins act as a catalyst in the generation of energy by utilizing carbohydrates and fats properly. Humans cannot live without vitamins and the human body cannot produce it on its own (except vitamin D and Vitamin B3). So it should be taken in required quantities through other sources such as the food we take, vitamin capsules etc. Vitamins can be found in major foods like meat, leafy vegetables, fruits etc.

Vitamin deficiency may cause some diseases and overdose also causes diseases.

Types of Vitamins

Vitamins are of two types:

• Fat-soluble – which are dissolved in fat
• Water-soluble – which are dissolved in water

Here is a table that illustrates the type of vitamins, sources, and diseases due to vitamin deficiency.

Minerals are also organic compounds found in nature, which helps in the growth of the human body. Minerals are essential for the human body to work properly. Deficiency of minerals leads to several disorders.

List of Minerals, their sources and functions

For more information about Vitamins, Minerals and sources of nutrition, visit BYJU’S.

• Vitamin B-12 Deficiency
• Vitamin A Deficiency
• Vitamin – B
• Nutrition In Human Beings

Put your understanding of this concept to test by answering a few MCQs. Click ‘Start Quiz’ to begin!

Select the correct answer and click on the “Finish” button Check your score and answers at the end of the quiz

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Healthy Lifestyle Products MK Plan

Nourishing your body with healthy food and products is the key to having a long life! But what are the best products? There’s so many to choose from, different brands, different types… in order to create the perfect marketing strategy that puts your products in the spotlight you must design...

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