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Questions and Answers
Which type of vitamin is Vitamin A?
Which type of vitamin is Vitamin A?
- Protein-soluble
- Mineral-soluble
- Water-soluble
- Fat-soluble (correct)
What are the two forms of Vitamin A found in different food sources?
What are the two forms of Vitamin A found in different food sources?
- Thiamine and Folate
- Alpha and Beta
- Retinoids and Carotenoids (correct)
- Riboflavin and Niacin
Where is Vitamin A absorbed in the body?
Where is Vitamin A absorbed in the body?
- Liver
- Small intestine (correct)
- Large intestine
- Stomach
In which form is Vitamin A stored in tissues?
In which form is Vitamin A stored in tissues?
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Which food source provides Vitamin A in the form of retinoids?
Which food source provides Vitamin A in the form of retinoids?
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Study Notes
Vitamin A Overview
- Vitamin A is a fat-soluble vitamin essential for various bodily functions, including vision, immune function, and skin health.
Forms of Vitamin A
- Two primary forms of Vitamin A are retinoids (preformed vitamin A) and provitamin A carotenoids (plant-based).
- Retinoids are typically found in animal products like liver and fish, while carotenoids are abundant in fruits and vegetables such as carrots and sweet potatoes.
Absorption in the Body
- Vitamin A is absorbed in the intestines, specifically in the upper part of the small intestine, where dietary fats help facilitate its absorption.
Storage in Tissues
- Vitamin A is stored in the liver primarily in the form of retinyl esters, which are converted to active retinol as needed by the body.
Food Sources for Retinoids
- Animal-derived food sources, such as liver, dairy products, and fish, provide Vitamin A in the retinoid form, making it readily usable by the body.
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