All You Need To Know About Vitamin A
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Everything You Need to Know About Vitamin A
Summary:
Ensuring quality vitamin intake is crucial for maintaining good health and disease prevention. Vitamins play key roles in processes like cell renewal, immune function, and bone strengthening. While a balanced diet provides many nutrients, it may not always meet the recommended dietary allowance (RDA) for essential vitamins. Supplements can help bridge this gap.
Keywords: best way, take vitamin, supplements, liquid nutritional, vitamin diet, supplement, gbg
Article Body:
Facts About Vitamin A
Vitamin A is a fat-soluble vitamin, meaning it needs fats and minerals for proper absorption in the digestive system. It can be stored in the body, so daily replenishment isn’t necessary. Vitamin A exists in two forms:
- Retinol (preformed vitamin A): Found in animal-derived foods.
- Carotene (provitamin A): Present in both plant and animal sources.
Vitamin A is measured in USP Units, IU (International Units), and RE (Retinol Equivalents). The recommended daily dosage for adult males is 1,000 RE (5,000 IU), while adult females require 800 RE (4,000 IU). Nursing mothers should increase their intake by 500 RE for the first six months and 400 RE for the next six.
Although there’s no official RDI/RDA for beta-carotene, 10,000?"15,000 IUs are generally needed to meet vitamin A requirements.
Benefits of Vitamin A
- Improves vision, particularly in low light, and aids in treating eye disorders.
- Boosts resistance to respiratory infections.
- Supports immune system function.
- Shortens the duration of illnesses.
- Maintains healthy tissues and organs.
- Reduces age spots.
- Promotes growth, strong bones, healthy skin, hair, teeth, and gums.
- Aids in treating skin conditions like acne and superficial wrinkles.
- Beneficial for emphysema and hyperthyroidism treatment.
Deficiency Diseases
A lack of vitamin A can lead to xerophthalmia and night blindness, often due to chronic fat malabsorption. It's most common in children under five, typically from poor dietary intake.
Best Natural Sources
Excellent sources of vitamin A include fish liver oil, liver, carrots, dark green and yellow vegetables, eggs, milk and dairy products, margarine, and yellow fruits. However, the color of a fruit or vegetable may not accurately indicate its beta-carotene content.
Supplements
Vitamin A supplements come in two forms: natural fish liver oil and water-dispersible types like acetate or palmitate, suitable for those intolerant to oil, especially acne sufferers. Typical daily doses range from 5,000 to 10,000 IU. In the U.S., vitamin A acid (retin A) is available by prescription for treating acne and superficial wrinkles.
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