vitamin D
Definition
Noun: A fat-soluble vitamin that is essential for the normal formation of bones and teeth and for the absorption of calcium and phosphorus from the intestine. It is naturally produced in the skin upon exposure to sunlight and can also be obtained from certain foods and supplements. A deficiency can lead to conditions like rickets in children.
Usage
"Vitamin D" is used as a non-count noun to refer to this specific nutrient. It is often discussed in contexts of health, nutrition, and biology. - It is common to use verbs like get, absorb, produce, synthesize, and lack with "vitamin D". - It is frequently modified by adjectives like sufficient, adequate, low, deficient, or dietary.
Examples
- General Statement:
- Sunlight is a primary source of vitamin D.
- Many people have a vitamin D deficiency during the winter months.
- With Verbs:
- The body produces vitamin D when skin is exposed to UVB rays.
- It is important to get enough vitamin D for bone health.
- With Adjectives:
- Milk is often fortified with additional vitamin D.
- A severe vitamin D deficiency can cause soft bones.
Advanced Usage
- "Vitamin D deficiency": A medical condition resulting from insufficient levels of vitamin D in the body.
- The doctor diagnosed the child with vitamin D deficiency.
- "Vitamin D synthesis": The process by which the body creates vitamin D, typically referring to skin production via sunlight.
- Vitamin D synthesis is less efficient in people with darker skin.
- "Vitamin D receptor": A protein in cells that binds to vitamin D, allowing it to function within the body.
- Research focuses on the role of the vitamin D receptor in immune function.
Variants and Related Words
- Calciferol (n): Another name for vitamin D, specifically referring to its D2 (ergocalciferol) and D3 (cholecalciferol) forms.
- Ergocalciferol is a form of calciferol found in plants.
- Cholecalciferol (n): The specific type of vitamin D (D3) produced by the skin and found in animal-based foods.
- Fish liver oil is rich in cholecalciferol.
- Ergocalciferol (n): The specific type of vitamin D (D2) found in some plants and fungi.
- Some mushrooms exposed to UV light contain ergocalciferol.
Synonyms
- Sunshine vitamin: An informal term for vitamin D, highlighting its connection to sunlight.
- They call it the sunshine vitamin for a good reason.
Related Phrases
- "Vitamin D supplement": A pill, liquid, or other product taken to increase vitamin D intake.
- Her physician recommended a daily vitamin D supplement.
- "Vitamin D levels": A measurement of the amount of vitamin D in a person's blood.
- The blood test will check your vitamin D levels.
Noun
-
a fat-soluble vitamin that prevents rickets
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