Vitamin A
Vitamines
Vitamines are important chemical compounds. Vitamines do not have any nutritional value but they are required in minute quantity in the body for proper functioning of the body.improper quantiy of vitamines in the body leads to several defficences in the body.some vitamines are produced in the while other must be taken in the diet.vitamines are classified into two types
1. Fat soluble vitamines
2. Water soluble vitamines
Vitamin A
Vitamin A is a fat soluble vitamin.Vitamin A is also called retinol,retinoic acid and retinal.the precursor of the vitamin A is beta carotene.Beta carotene is converted into the vitamin A in the body.
Role/Functions of Vitamin A
1. Vision
Vitamin A has a great role in the vision.Vitmin A combines with the opsin(which is protein)and form an important compound called Rhodopsin which plays a vital role in yhe vision
2. Vitamin A is a part of certain co-enzymes
3. Vitamin A has an important role in the development of bones
4. Vitamin A has aslo a role in groth of the body
5. Vitamin A is very important in the good looking of the skin
6. Vitamin A has roles in gene expressing and cell defferentiation.
Source
Vitamin A is found in the carrots,fruits and fresh vegetables and cod liver oil
Defficiences of the Vitamin A
Malnutirtion of Vitamin A leads to several defficiences in the body
1. Night blindness
2. Xeropthalmia
3. Defficiency in growth and bone development
4. Keratinization of skin
5. Cell defferentiation and gene expression does not occur
Life Stage Group | Recommended Dietary Allowances (RDA) Adequate Intakes (AI*)
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Infants 0–6 months
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Children 1–3 years
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Males 9–13 years
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Females 9–13 years
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Pregnancy <19>50 years |
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Lactation <19>50 years |
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