Vitamin A - benefit - deficiency - sources
- 31 01
Vitamin A is an essential light absorbing molecule in retina of our eyes. It was first discovered in 1913 as a fat soluble vitamin. It is also called as retinol a well known name in skin care products for anti-aging.
Forms of Vitamin A:
1. Retinol (Vitamin A) which get absorbed while eating animal food sources.
2. Carotenoids which comes from vegetables and get converted into retinol through metabolism in our body. The vegetables that contain Carotenoids are labeled as ProvitaminsA.
Vitamin A plays an active role in variety of functions of our body. These function included vision, immune function, reproduction, gene transcription, skin health and antioxidant activity. It is also called "Miracle Vitamin" for boosting the immune system of body. Key benefits of Vitamin A are
- It improves vision and prevents night blindness. It plays active role in vision cycle and helps to see black and white as well as seeing at night.
- It works as antioxidant and helps in protecting the body tissues against cancerous growth
- It also helps in formation of healthier bones.
- As an immune boosting agent, it guards body cell from bacteria and viruses.
- It also helps in maintaining skin health and useful in skin ailments like acne and eczema
- It is widely used in skin care products related to anti-aging as it helps in removing age lines and age spots
- It also plays an important role in gene transcription
Deficiency Of Vitamin A:
Vitamin A deficiency occurs for not taking food rich in vitamin A and beta-carotene. Millions of children around world are affected of deficiency of Vitamin A. Vitamin A deficiency is characterized as primary deficiency or secondary deficiency.
Primary deficiency: It occurs in children and adult when not taking vitamin A rich food.
secondary deficiency: Vitamin A is a fat soulble vitamin and require fat to get absorb in intestine. low fat diets can cause this type of deficiency. Zinc deficiency can also impair absorption of Vitamin A
The common sign of vitamin A deficiency is impaired vision or night blindness. Other symptoms are impaired immunity and white lumps at hair follicles (hypokeratosi).
Pregnant and breastfeeding women require adequate supply of Vitamin A but at the same time excess Vitamin A, especially through vitamin supplementation, can lead to birth defects.
Daily allowance of Vitamin A as per US recommendation is 1000 retinol equivalents but it is not for pregnant or breastfeeding woman as they require more vitamin A.
Carrot juice is a good source of Vitamin A. Organ meet such as liver and giblets are good source of vitamin A. sweet potato, pumpkin, spinach, Beet, Dendilian green are also good source of vitamin A.
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