2024-11-01 21:44:27 +00:00
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Vitamins were first discovered in 1921
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2024-11-01 21:49:27 +00:00
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- Casamir Runk coined the term vitamin
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2024-11-01 21:44:27 +00:00
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- Vita = life
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- Amine = a type of nitrogen containing substance
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2024-11-01 21:49:27 +00:00
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- The first discovered vitamin was thiamin
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- There are 13 known vitamins, plus 5 vitamin like substances
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- It is unlikely that any new vitamins will be discovered - (babies and sick people can live on synthetic liquid diet?)
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- A vitamin is a complex organic compound that regulates certain metabolic processes
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- Cannot be synthesized in sufficient quantities by the body
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- Occurs naturally in foods
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- Deficiency disorder occurs if substance is missing from the body
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- They do not provide any energy
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- Vitamins are organic, but they differ from macronutrients:
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- **Not metabolized for energy**
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- Present in small amounts in foods
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- Required in milligram and microgram amounts
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- Because vitamins are organic
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- They are subject to heat degradation
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- Exposure to excessive heat, alkaline substances, light, and air can destroy certain vitamins
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- **Water soluble vitamins can leach out of food and dissolve in cooking water**
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# Fat Soluble Vitamins
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- Fat soluble vitamins are **K, A, D, E**
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- Found in lipid portions of the body
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- Associate with lipids in the body
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- **Digested and absorbed with fats
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- Stored in the body
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- Can cause toxicity
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# Water soluble vitamins
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- Water soluble vitamins are the **B-vitamins**: thiamin, rib
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