vitamin A1
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Definition
Noun: 1. A specific form of Vitamin A: Vitamin A1, also known as retinol, is an unsaturated alcohol compound. It is the primary, pre-formed type of vitamin A found in animal sources, particularly in the liver oils of marine fish. It is essential for vision, immune function, and cellular growth.
Usage and Examples
As a nutrient/supplement:
- Cod liver oil is a rich source of vitamin A1.
- The doctor recommended a supplement containing vitamin A1 to improve night vision.
In biochemical/biological contexts:
- The study compared the bioavailability of vitamin A1 from different dietary sources.
- Vitamin A1 is synthesized in the body from beta-carotene.
Advanced Usage and Notes
- Scientific Terminology: In precise scientific and nutritional contexts, "vitamin A1" specifies retinol, distinguishing it from other vitamin A compounds like vitamin A2 (3,4-dehydroretinol).
- Metabolic Pathway: The term is used when discussing the conversion of provitamin A carotenoids (like beta-carotene) into the active form in the body.
Variants and Related Words
- Retinol: The chemical name and a direct synonym for vitamin A1.
- Preformed vitamin A: A descriptive term encompassing vitamin A1 (retinol) and other active animal-based forms like retinal and retinoic acid.
- Provitamin A: Refers to carotenoids (like beta-carotene) that the body can convert into vitamin A1. This is a related but distinct category.
Synonyms
- Retinol (primary synonym)
- All-trans-retinol (specific chemical form)
Related Compounds and Terms
- Vitamin A: The broader category that includes vitamin A1 (retinol), vitamin A2, and related active metabolites.
- Beta-carotene: A provitamin A carotenoid that the body converts into vitamin A1.
- Retinal: The aldehyde form of vitamin A1, crucial for vision.
- Retinoic acid: The acid form of vitamin A1, important for gene regulation and growth.
Noun
- an unsaturated alcohol that occurs in marine fish-liver oils and is synthesized biologically from carotene