Vitamin a presentation, Vitamin A Deficiency, Vitamin A toxicityDhruvendra Pandey
This presentation contains Importance of vitamin A, Sources of Vitamin A, Absorption,Transport and Excretion of Vitamin A, Vitamin A Deficiency, Vitamin A Toxicity, Required dose of Vitamin A, Nutrition, Nutrition deficiency
Vitamin k is a group of lipophilic hydrophobic vitamins. Fat soluble compound necessary for the synthesis of several proteins required for blood clotting.
Occurs in several forms:
Vitamin K1 (Phylloquinone)
Vitamin K2 (Menaquinone)
Vitamin K3 (Menadione) – synthetic form
Vitamins are substances that our body needs for proper grow and development.It is an essential nutrient that body cannot produce enough of and that's why it needs to get from food.
Vitamins are of 13 types and can be classified as Fat soluble vitamins (A,D,E & K ) and Water Soluble Vitamin (Vitamin-C & B-complex).
Learn about various types of Vitamins and Minerals that are essential for our health, growth and development. Also learn about the food sources of these vitamins and minerals.
Vitamin C is a water soluble vitamin and thus is not stored in the body . It is potent antioxidant and in this covid-19 arena ,there is lot of emphasis of its role in enhancing immunity. it is required daily in 40-80 mgm. This requirement can be easily fulfilled by eating food which are the rich sources of this vitamin.Hope this presentation will clear lots of myths which are prevalent like taking tablet 500-1000mgm daily
Lecture 11 nutrients involved in bone healthwajihahwafa
At the end of this lecture, the student should be able to:
Describe the process of bone development .
Describe the relationship between nutrients and bone health
Discuss how consuming nutrients that involved in bone health can reduce the risk for osteoporosis
Vitamin a presentation, Vitamin A Deficiency, Vitamin A toxicityDhruvendra Pandey
This presentation contains Importance of vitamin A, Sources of Vitamin A, Absorption,Transport and Excretion of Vitamin A, Vitamin A Deficiency, Vitamin A Toxicity, Required dose of Vitamin A, Nutrition, Nutrition deficiency
Vitamin k is a group of lipophilic hydrophobic vitamins. Fat soluble compound necessary for the synthesis of several proteins required for blood clotting.
Occurs in several forms:
Vitamin K1 (Phylloquinone)
Vitamin K2 (Menaquinone)
Vitamin K3 (Menadione) – synthetic form
Vitamins are substances that our body needs for proper grow and development.It is an essential nutrient that body cannot produce enough of and that's why it needs to get from food.
Vitamins are of 13 types and can be classified as Fat soluble vitamins (A,D,E & K ) and Water Soluble Vitamin (Vitamin-C & B-complex).
Learn about various types of Vitamins and Minerals that are essential for our health, growth and development. Also learn about the food sources of these vitamins and minerals.
Vitamin C is a water soluble vitamin and thus is not stored in the body . It is potent antioxidant and in this covid-19 arena ,there is lot of emphasis of its role in enhancing immunity. it is required daily in 40-80 mgm. This requirement can be easily fulfilled by eating food which are the rich sources of this vitamin.Hope this presentation will clear lots of myths which are prevalent like taking tablet 500-1000mgm daily
Lecture 11 nutrients involved in bone healthwajihahwafa
At the end of this lecture, the student should be able to:
Describe the process of bone development .
Describe the relationship between nutrients and bone health
Discuss how consuming nutrients that involved in bone health can reduce the risk for osteoporosis
Vitamins are organic compounds that are essential for normal growth and nutrition and are required in small quantities, their deficiency causes diseases.
Biochemist Casimir Funk discovered vitamin B1 in 1912 in rice bran.
It cannot be synthesized in sufficient quantities by an organism and must be obtained from the diet.
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Vitamins UNIT-7 biochemistry and clinical pathology, D.Pharm 2nd year.pptxAanchal Gupta
Vitamins, unit-7 for D.Pharm second year, According to PCI syllabus.
Definition and classification with examples
Sources, chemical nature, functions, coenzyme form, recommended dietary requirements, deficiency diseases of fat-and water-soluble vitamins
Role of vitamins in orthodontics final /certified fixed orthodontic courses ...Indian dental academy
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This PowerPoint is about qualitative research design and what are different approaches one can adopt This slides also talks about the importance of health care research and what different approaches one can adopt
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This slide is about India New Born Action Plan. It encloses complete detail of the plan and what are its principles and objective and how it aims to achive it
Couples presenting to the infertility clinic- Do they really have infertility...Sujoy Dasgupta
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Anti ulcer drugs and their Advance pharmacology ||
Anti-ulcer drugs are medications used to prevent and treat ulcers in the stomach and upper part of the small intestine (duodenal ulcers). These ulcers are often caused by an imbalance between stomach acid and the mucosal lining, which protects the stomach lining.
||Scope: Overview of various classes of anti-ulcer drugs, their mechanisms of action, indications, side effects, and clinical considerations.
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Ve...kevinkariuki227
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
These simplified slides by Dr. Sidra Arshad present an overview of the non-respiratory functions of the respiratory tract.
Learning objectives:
1. Enlist the non-respiratory functions of the respiratory tract
2. Briefly explain how these functions are carried out
3. Discuss the significance of dead space
4. Differentiate between minute ventilation and alveolar ventilation
5. Describe the cough and sneeze reflexes
Study Resources:
1. Chapter 39, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 34, Ganong’s Review of Medical Physiology, 26th edition
3. Chapter 17, Human Physiology by Lauralee Sherwood, 9th edition
4. Non-respiratory functions of the lungs https://academic.oup.com/bjaed/article/13/3/98/278874
Pulmonary Thromboembolism - etilogy, types, medical- Surgical and nursing man...VarunMahajani
Disruption of blood supply to lung alveoli due to blockage of one or more pulmonary blood vessels is called as Pulmonary thromboembolism. In this presentation we will discuss its causes, types and its management in depth.
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ARTIFICIAL INTELLIGENCE IN HEALTHCARE.pdfAnujkumaranit
Artificial intelligence (AI) refers to the simulation of human intelligence processes by machines, especially computer systems. It encompasses tasks such as learning, reasoning, problem-solving, perception, and language understanding. AI technologies are revolutionizing various fields, from healthcare to finance, by enabling machines to perform tasks that typically require human intelligence.
- Video recording of this lecture in English language: https://youtu.be/lK81BzxMqdo
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Tom Selleck Health: A Comprehensive Look at the Iconic Actor’s Wellness Journeygreendigital
Tom Selleck, an enduring figure in Hollywood. has captivated audiences for decades with his rugged charm, iconic moustache. and memorable roles in television and film. From his breakout role as Thomas Magnum in Magnum P.I. to his current portrayal of Frank Reagan in Blue Bloods. Selleck's career has spanned over 50 years. But beyond his professional achievements. fans have often been curious about Tom Selleck Health. especially as he has aged in the public eye.
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Introduction
Many have been interested in Tom Selleck health. not only because of his enduring presence on screen but also because of the challenges. and lifestyle choices he has faced and made over the years. This article delves into the various aspects of Tom Selleck health. exploring his fitness regimen, diet, mental health. and the challenges he has encountered as he ages. We'll look at how he maintains his well-being. the health issues he has faced, and his approach to ageing .
Early Life and Career
Childhood and Athletic Beginnings
Tom Selleck was born on January 29, 1945, in Detroit, Michigan, and grew up in Sherman Oaks, California. From an early age, he was involved in sports, particularly basketball. which played a significant role in his physical development. His athletic pursuits continued into college. where he attended the University of Southern California (USC) on a basketball scholarship. This early involvement in sports laid a strong foundation for his physical health and disciplined lifestyle.
Transition to Acting
Selleck's transition from an athlete to an actor came with its physical demands. His first significant role in "Magnum P.I." required him to perform various stunts and maintain a fit appearance. This role, which he played from 1980 to 1988. necessitated a rigorous fitness routine to meet the show's demands. setting the stage for his long-term commitment to health and wellness.
Fitness Regimen
Workout Routine
Tom Selleck health and fitness regimen has evolved. adapting to his changing roles and age. During his "Magnum, P.I." days. Selleck's workouts were intense and focused on building and maintaining muscle mass. His routine included weightlifting, cardiovascular exercises. and specific training for the stunts he performed on the show.
Selleck adjusted his fitness routine as he aged to suit his body's needs. Today, his workouts focus on maintaining flexibility, strength, and cardiovascular health. He incorporates low-impact exercises such as swimming, walking, and light weightlifting. This balanced approach helps him stay fit without putting undue strain on his joints and muscles.
Importance of Flexibility and Mobility
In recent years, Selleck has emphasized the importance of flexibility and mobility in his fitness regimen. Understanding the natural decline in muscle mass and joint flexibility with age. he includes stretching and yoga in his routine. These practices help prevent injuries, improve posture, and maintain mobilit
These lecture slides, by Dr Sidra Arshad, offer a quick overview of physiological basis of a normal electrocardiogram.
Learning objectives:
1. Define an electrocardiogram (ECG) and electrocardiography
2. Describe how dipoles generated by the heart produce the waveforms of the ECG
3. Describe the components of a normal electrocardiogram of a typical bipolar leads (limb II)
4. Differentiate between intervals and segments
5. Enlist some common indications for obtaining an ECG
Study Resources:
1. Chapter 11, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 9, Human Physiology - From Cells to Systems, Lauralee Sherwood, 9th edition
3. Chapter 29, Ganong’s Review of Medical Physiology, 26th edition
4. Electrocardiogram, StatPearls - https://www.ncbi.nlm.nih.gov/books/NBK549803/
5. ECG in Medical Practice by ABM Abdullah, 4th edition
6. ECG Basics, http://www.nataliescasebook.com/tag/e-c-g-basics
1. Dr Nishant Kumar
Assistant Professor
Department of Community Medicine
Madhubani Medical College , Madhubani , Bihar
Vitamins & Minerals
2. Active compound is Retinol and its Provitamin ( precursor)
carotenoids.
It is a Fat soluble pale yellow compound
It is stable to heat at ordinary temperature but liable to oxidation and
destruction on rancidity of fat.
Carotenoids cannot be wholly be converted into retinol in the body and
man absorb and utilizes these pigment less efficiently (6 microgram of
β- carotene has biological activity of 1 microgram retinol(RE))
Other carotenoids have even lesser Vitamin A activity
Vitamin A ( Retinol)
2
3. Animal sources: meat, liver , kidney, milk, fish, and egg.
It can be also be formed in intestinal mucosa from pigments know as carotenoids which is
widely distributed in plants.
Carotenoids are found in colored fruits and vegetables. (e.g. outer green leaves of
vegetables like cabbage)
One of the important source of Provitamin A is β- carotene and is found in abundance in
yellow – orange vegetable and fruits ( e.g. pumpkins, papaya, mango, apricots, yellow
peaches, and green leafy vegetable)
Carrots – β- carotene, β- Crytoxanthin is in Citrus fruits.
Food heated for long time losses Vitamin A , boiling , canning or freezing of food does not
cause loss and drying and dehydration do cause significant loss
Vitamin E protects it from oxidation.
Vitamin A - Sources
3
4. It is vital for the formation of retinal pigment rhodopsin in rods of
retina .Exposure to light results in a series of changes in its
configuration , which leads to the adaptation of vision in dark .Retinol
deficiency leads to impairment of dark adaptation or night blindness.
It is essential for integrity of cellular structure ( epithelial tissue of
respiratory , gastrointestinal , genitourinary and skin)
It has a role in the immune defence mechanism of the body
It has antioxidant activity
Vitamin A - Functions
4
5. 5
Adult – 600 mg of retinol ( including children above 6 years and pregnant lady)
Lactating mother- 950 mg
Deficiency
Ocular Manifestation- Most common
a) Xeropthalmia
Extra Ocular manifestation
a) Dry rough , itchy skin ; rash c) Loss of acuity of senses , smell and taste
b) Dry brittle hair and nails d)Loss of appetite , e) anemia , fatigue
f) low immunity g) Poor growth i) Increased risk of cancer.
Vitamin A – RDA & deficiency
6. Vitamin A Deficiency(VAD) is the leading cause of preventable blindness in children.
It also increase the risk of disease and death from severe infection.
In pregnant women VAD causes night blindness and may increase the risk of maternal
mortality
VAD is a public health problem in more than half the countries of Africa , and South East
Asia
World wide 256 million people suffer from preclinical xerophthalmia and 2.6 million
develop xerophthalmia , 700,000 develop corneal ulcers and 350,000 become blind
In India it is common in preschool children in AP, TN, Karnataka, WB & Bihar.
The prevalence of Bitot spot is 1 to 5% in 1 to 5 years of age.
Vitamin A Deficiency -Introduction & Problem Statement
6
7. 7
Most common age group affected – 1 to 3 year of age
A complex web of causation which includes , ignorance , poverty ,
infection , lack of food, malnutrition , environmental factors and social
factors.
Weaning and infection
Other Social factors
Poor Environmental sanitation Practices
VAD - Etiology
8. 8
WHO classification Clinical condition Prevalence among pre-school
children
XN Night blindness >1%
X1A Conjunctival xerosis ConjXerosis.jpg
X1B Bitot’s spot Bitot spot.jpg >0.5%
X2 Corneal Xerosis
X3A Corneal ulceration(<1/3rd of
cornea)
>0.001
X3B Corneal ulceration (>1/3rd of
cornea) corneal ulcer.jpg
>0.001
XS Corneal Scar corneal scar.jpg >0.05
XF Xeropthalmic fundus Xerophtalmia.jpg
Biochemical Plasma retinol <0.35μmol/l
VAD – Clinical feature
9. 9
200,000 IU(110mg) of Retinol palmitate ( oil miscible Vitamin A) is administered orally for
2 days.
In case of vomiting waster miscible Vitamin A 100,000 IU is administered as IM injection
followed by 200,000 IU 1 to 4 weeks
For Infants less than 8 kg of weight half of the dose is given.
For prevention
a) Dietary modification
b) Nutritional education
c) Fortification
d) Periodic dosage – given with immunization programme.
e) Long term action.
Treatment & Prevention for Xeropthalmia
10. 10
Acute Hypervitaminosis can occur by a single of vitamin A more than
200mg.
Chronic misuse of supplement more than 4000RE( retinol equivalent ;
1IU vitamin A = 0.3RE) for infants and 7000RE for adult.
Large amount more than 100 times the requirement can overwhelm the
liver and produce intoxication
It is characterized by skin , mucous membrane changes , dry lips,
dryness of nasal mucosa , peeling of skin , headache , nausea , it is
toxic to fetus, causing craniofacial , CNS and thymic malformation.
Toxicity – Hypervitaminosis A
11. 11
Vitamin D refers to two molecules – ergocalciferol ( vitamin D2) and
cholecalciferol ( vitamin D3).
Vitamin D metabolism.jpg
Food sources : Cod liver oil , other oily fish , milk , margarine , egg
and liver.
Functions : It regulates the absorption and excretion of calcium from
small intestine and also plays an essential part in the mechanism of
mineralizing bone .
Vitamin D status can be assessed by the measurement of plasma 25-
hydroxyl- cholecalciferol level.
Vitamin D ( Calciferols)
12. 12
Child – 100- 400IU/day ( 2.5- 10μg), adult male and female(5μg /day).
Its deficiency rickets in children , characterized by reduced
calcification of bone epiphysis . Skeletal deformities , bone pain, and
muscle weakness. In adult it results in osteomalacia.
Vitamin D defiency.jpg
Rickets.jpg
Osteomalacia.jpg
Vitamin D – RDA and Deficiency
13. 13
There are eight forms of vitamin E that are synthesized in the plants
they are four tocopherol (α,β,γ and δ tocopherols) and four tocotrienols
(α,β,γ and δ) . Alpha tocopherols which is synthesized commercially
has the highest biological activity , and is used as the standard against
which activity of other form is measured.
Sources – Vegetable oil ( groundnut, sunflower, safflower, cotton seed,
corn , wheat germ , rape seed , palm and other oils). Nuts ( almond and
peanuts) are also good source. Eggs , butter whole meal cereals are
moderately good. Meat , fruits vegetable contain small amount .Food
rich in PUFA are good source.
Vitamin E ( tocopherol)
14. 14
It has a strong antioxidant property and protect cell membrane and
lipoprotein against the damage of free radicals. It also prevents the non
enzymatic destruction of PUFA by molecular oxygen
It maintains the cell membrane integrity
It has role in the DNA and prostaglandin synthesis
RDA – 12 mg/day
Deficiency : Interferes with normal reproduction and causes a form of
muscular dystrophy.
Familial Isolated Vitamin E ( FIVE) deficiency is known as a genetically
inherited disease it produces, reduced tendon reflexes by age 3-4 , loss of
touch and pain sensation , unsteady gait, loss of coordination , impaired
eye movement in adolescence. ( also seen in patients with fat
malabsorption).
Vitamin E – FUNCTION , RDA and deficiency
15. 15
It exist in nature in two forms , Vitamin K1 ( phylloquinone) isolated from
lucerine is the only form that occur in plants. It is yellow oil , soluble in fat
solvent but only slightly in water. Vitamin K2( menaquinone) is produced by
bacteria in the lumen of large intestine.
Food sources – Green leafy vegetables, Vegetable oil ( soya bean oil ), eggs,
meat and dairy products.
Functions –
a) It promotes the synthesis of γ- carboxy glutamic acid (Gla)in the liver
which is essential in the formation of prothrombin( or factor –II) and also
factor ( VII, IX, and X) and helps in blood coagulation.
b) Some other proteins also contain Gla and require Vitamin K for the
synthesis ( e.g. osteocalcin , a bone protein made by osteoblast)
Vitamin K
16. 16
Male - 120μg and Female 90μg .
Deficiency
a) Poor blood clotting due to low prothrombin activity
Neonates are born with very low stores of vitamin K due to absence of
bacteria in gut flora , so neonates are given vitamin K at birth.
Adult may manifest symptoms of vitamin K deficiency in obstructive
jaundice as lack of bile lead to poor absorption of vitamin K.
Vitamin k – RDA and Deficiency
17. 17
It is a water soluble ,crystalline white substance.
It is very sensitive to oxidation which is accelerated by heat, alkaline solution light and
traces of metals, especially copper.
It is present in all the body tissue but in high concentration in adrenal glands , pituitary
gland and intestinal gland.
Sources: Citrus fruits, (oranges, lemons) guavas, papayas, mangoes, gooseberry, kiwifruit ,
green vegetables , root vegetables( sweet potatoes), germinating seed , pulses and grain.
Vitamin C content of fruits and vegetables is reduced by storage and damage to plant cell by
rough handling, bruising, or cutting which result in release of ascorbic acid oxidase which
oxidises ascorbic acid.
High pressure steaming as well as rapid frying destroys oxidase enzyme and hence causing
greater retention of ascorbic acid
Vitamin C ( ascorbic acid)
18. 18
It is important for the formation of collagen and is therefore important
for the formation and maintenance of normal structure of the
connective tissues, bone , tendons, skin , teeth and capillaries.
It enhances the absorption of Iron , through the conversion of ferric to
ferrous form.
It has antioxidant property.
It influences the maturation of red blood cells , synthesis of bile and
metabolism of drugs and carcinogens by the liver
RDA- 40 mg/day for adults and Lactating mother – 80mg/day.
Ascorbic acid – Functions & RDA
19. 19
Deficiency causes defective formation of intercellular ground
substance whose characteristic gross lesion occur in gums, bones and
capillaries.
Wound healing is delayed
Deficiency leads to “Scurvy” the sign and symptoms include spongy
and bleeding gums , perifollicular hemorrhage in the skin , sub
periosteal hematomas, and poor wound healing. Fatigue and muscle
weakness can also occur.
Ascorbic Acid - Deficiency
21. 21
Minerals can be classified into Macro minerals and micro minerals
Those mineral which constitute at least 0.01% of body weight (5g in a
60kg man) or those mineral whose requirement are more than 100mg
per day are called macro minerals
Minerals
Macro minerals Micro minerals
Calcium, phosphorus,
magnesium, sodium,
potassium, chloride, Sulphur
Iron , Zinc Iodine, copper,
manganese, molybdenum,
selenium, chromium, and
fluroine
22. 22
Absorbed from duodenum and proximal jejunum.
Transported by transferrin ,a iron binding protein.
Stored in the reticuloendothelial system in combination with apoferritin.
Excreted(0.8-1mg/d) through exfoliated GI cells, skin, stool, urine,sweating.
Iron.png
Total body iron 3-4 gms
Haemoglobin 65-70%
Stores 20-25%
Myoglobin and enzymes 5-10%
Plasma iron (trasferrin bound) 0.1-0.2%
Iron - Metabolism
24. 24
Iron- Inhibitors and Enhancers
INHIBITORS:
Phytates in cereals
Tannins in tea
Polyphenols in coffee
Oxalates in vegetables
Phosphates in egg
Proteins in dals
ENHANCERS:
Ascorbic acid :Vit C
Citric acid,Lactic acid
Sprouted and fermented food
Meat and fish
25. 25
More than 350 Million women, twice the infant, children and equal
number adolescents are anemic.
Anemia during pregnancy puts the women at 3 times greater risk of
delivering LBW babies & 9 times higher risk of perinatal mortality.
contributing significantly for increased IMR & MMR. 90% of the
cases in developing countries and highest in South Asia
In developing countries
Half of women and young children are anemic(40-60%)
40-80% of pregnant women are anemic.
20-25% of maternal deaths are due to anemia
Iron deficiency Anemia- Problem Statement
26. 26
Low iron intake
Haem iron is better absorbed than Non-Haem iron.
Dietary sources poor in iron.
Increased demand as in adolescence, pregnancy and lactation.
Increased losses as in malaria, hook worm, excessive menstrual loss
and repeated pregnancies.
Poor absorption and utilization.
Iron deficiency Anemia- etiology
29. 29
TREAT THE UNDERLYING CAUSE
Modes of management.
ORAL
PARENTAL
BLOOD TRANSFUSION
Iron deficiency Anemia- treatment
30. 30
Mild and moderate cases
Cheap ,safe and effective
Start with lower dose and increase if when tolerated to 2-3 times a day
Different salts are available in market
Tablet is to be taken with food
Tea or coffee to be avoided
Vitamin C helps in absorption
Calcium salts and antacids to be avoided
Iron deficiency Anemia- oral Therapy
31. 31
Non compliance
Intolerance
Poor absorption(mal-absorption syndrome, dysentry)
No response after 4 weeks in confirmed cases of IDA
Moderate to severe cases seen late in pregnancy
Iron deficiency Anemia- parental
32. 32
Severe anaemia.
Confirmed cases not responding to oral or parental therapy.
Severely anaemic requiring emergency surgery.
Refractory anaemia.
Iron deficiency Anemia- blood transfusion
33. 33
Individual level
Nutritional education
Personal hygiene
Contraception
Iron & folic acid supplementation
Promotion of breast feeding
Family level
Nutritional education
Birth spacing/ no of pregnancies
Control of parasites
Improvement of sanitation
Cooking in iron vessels
Iron deficiency Anemia- Prevention
34. 34
Community Level
Nutritional education .
Screening of adolescent girls in schools & iron supplementation.
Iron & folic supplements to pregnant ladies.
Deworming of school children .
Delaying marriage age & birth spacing.
Iron supplementation by fortification.
Iron deficiency Anemia- Prevention
35. 35
National nutritional anaemia prophylaxis programme
Children with clinical anaemia: 20mg of elemental iron and 100mcg
of folic acid,100days a year
Pregnant and lactating :100mg of elemental iron and 500mcg of
folic acid.
Treat worm infestation with mebendazole.
Drugs continued for nursing mothers and family planning acceptors
WIFS ( Weekly Iron Folic Acid Supplementation)
Weekly Iron tablet and folic acid tablet to adolescent (10-19)at
school
Twice Yearly Deworming by Albendazole .WIFS.jpg
Iron deficiency Anemia- national Programme
36. 36
It is an essential trace element as it in an integral component of thyroid
hormone : thyroxine and triiodothyronine.
Iodine deficiency is endemic in mountainous region since iodine is
washed from the soil .
Its deficiency causes Iodine deficiency disorders that effect all ages :
abortions, still birth , cretinism , mental retardation, deaf-mutism,
dwarfism, and goiter.
Sources
a) Food sources grown in iodine rich soil
b) Dairy products
c) Eggs
d) Cereals grain, legumes, green leafs.
IODINE- Introduction and Sources.
37. 37
Goitrogens
a) Certain vegetable of brassica family like cabbage , cauliflower, and
radish, contain goitrogens such as thiocyanates and cynoglycosides.
They make the iodine present in food unavailable to the body.
Goitrogens can be inactivated by heating.
Absorption: Dietary iodine is absorbed from small intestine follows
two main pathways within the body. 30% is used by the thyroid gland
for synthesis and the remainder is excreted by the urine.
Functions: Iodine is an integral component of thyroid hormone
thyroxine(T4) ,and tri- iodothyroxine (T3). Fetus and neonate normal
protein metabolism in the brain and CNS require iodine.
Iodine- Metabolism
38. 38
Daily requirement of iodine is 150μg/day for adult ;
a) Infant - 50μg/day
b) Children- 100μg/day
c) Pregnancy- 200μg/day.
Deficiency- Iodine Deficiency Disorders(IDD)
a) Adults- hypothyroidism, raised level of TSH, resulting in hyperplasia of
thyroid gland leading to goiter. Symptoms include lethargy, poor cold
tolerance, bradycardia and myxedema. Infertility may also occur.
b) Fetus and Infant- ‘Cretinism’- symptoms include mental retardation, hearing,
speech defect, disorders of gait, and growth retardation
c) At birth- still birth, miscarriage; Neonatal hypothyroidism is a sensitive
indicator of incidence of IDD in a community
Iodine- RDA and Deficiency
39. 39
Fortification of salt with iodine is carried out to reduce IDD. The PFA
act has specified an iodine concentration of 30 and 15 ppm at source
and consumer end respectively thereby providing150 mg or iodine in
10 gram of salt.
Iodized oil: Injectable and oral iodized oil are available as oral drops
(400mg/ml) and intramuscular injection (480mg/ml).Single IM
injection of iodized oil can protect a woman through pregnancy and
one year post partum; Oral supplementation is to be repeated every
months to 1 year.
Nutritional Education
Iodine – Prevention and control
40. 40
Normally present in the bones and teeth and is essential for normal
mineralization of bones and formation of dental enamel.
Sources
a) Sea food , cheese and tea are rich sources
b) Main Source for man is drinking water
The fluoride content of drinking water in India is about 0.5mg/l;
Deficiency of fluoride in water below 0.5mg/ml is usually associated with
dental caries
Excess ingestion of fluorine (>2-3ppm in water ) is associated with skeletal
and dental fluorosis and is a reported health problem in rural district of AP,
Haryana, Kerala, Punjab, Rajasthan, and TN
Fluorine
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Changing Water sources
Defluoridation : Removal of excess fluoride from water . Nalgonda
technique is an accepted form of defluoridation. It involves addition of
lime and alum to the water sequentially , it is then followed by
flocculation , sedimentation and filtration of water.
Avoiding intake of excess fluoride.
Fluorine