Podcast
Questions and Answers
What is the main function of Vitamin D in the body?
What is the main function of Vitamin D in the body?
Which form of Vitamin D is derived from a steroid?
Which form of Vitamin D is derived from a steroid?
What is the primary source of Vitamin D in the diet?
What is the primary source of Vitamin D in the diet?
How is Vitamin D absorbed from the diet?
How is Vitamin D absorbed from the diet?
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What is the precursor of Vitamin D3 in the skin upon UVB exposure?
What is the precursor of Vitamin D3 in the skin upon UVB exposure?
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Which hormone is involved in the activation of Vitamin D in the kidneys?
Which hormone is involved in the activation of Vitamin D in the kidneys?
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What is the main metabolic function of 1,25-dihydroxyvitamin D?
What is the main metabolic function of 1,25-dihydroxyvitamin D?
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What is the approximate percentage of the population with sufficient Vitamin D status in Ireland?
What is the approximate percentage of the population with sufficient Vitamin D status in Ireland?
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What is the chemical structure of Vitamin D?
What is the chemical structure of Vitamin D?
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Which of the following foods is NOT a significant source of dietary Vitamin D?
Which of the following foods is NOT a significant source of dietary Vitamin D?
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What is the primary form of dietary Vitamin D absorbed from micelles by passive diffusion?
What is the primary form of dietary Vitamin D absorbed from micelles by passive diffusion?
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What is the main function of 1,25-dihydroxyvitamin D in the body?
What is the main function of 1,25-dihydroxyvitamin D in the body?
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What is the approximate percentage of the population with sufficient Vitamin D status in Ireland?
What is the approximate percentage of the population with sufficient Vitamin D status in Ireland?
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What is the precursor of Vitamin D3 in the skin upon UVB exposure?
What is the precursor of Vitamin D3 in the skin upon UVB exposure?
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Which hormone is involved in the activation of Vitamin D in the kidneys?
Which hormone is involved in the activation of Vitamin D in the kidneys?
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What are the two forms of Vitamin D?
What are the two forms of Vitamin D?
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Study Notes
Vitamin D Functions and Forms
- Vitamin D's main function is to maintain calcium levels and bone health.
Vitamin D Synthesis and Absorption
- Cholecalciferol (D3) is derived from 7-dehydrocholesterol, a steroid precursor in the skin.
- The primary source of Vitamin D in the diet is fatty fish, fish liver oils, and fortified dairy products.
- Vitamin D is absorbed from the diet through micelles by passive diffusion in the small intestine.
- The primary form of dietary Vitamin D absorbed is Cholecalciferol (D3) and Ergocalciferol (D2).
Vitamin D Activation and Metabolism
- 1,25-dihydroxyvitamin D is the active form of Vitamin D, involved in maintaining calcium levels and bone health.
- The hormone involved in the activation of Vitamin D in the kidneys is Parathyroid Hormone (PTH).
Vitamin D Status and Sources
- Approximately 12% of the population in Ireland has sufficient Vitamin D status.
- Vitamin D is not a significant source of dietary Vitamin D in plant-based foods.
- The two forms of Vitamin D are Cholecalciferol (D3) and Ergocalciferol (D2).
- The chemical structure of Vitamin D is a secosteroid, resembling a steroid molecule with a broken ring.
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Description
Test your knowledge on the importance of Vitamin D in bone and teeth development with this quiz. Explore EFSA's health claim application and gain insights into the role of Vitamin D in human nutrition.
