Lecture10

Lecture10 - Vitamin deficiency occurs when that vitamin is...

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Vitamins • Essential organic substances • Yield no energy, but facilitate energy-yielding chemical reactions • If absent from a diet, it will produce deficiency signs and symptoms • Fat-soluble vitamins • Water-soluble vitamins • Preservation of vitamins in foods – Limit exposure to light, heat, air, water, and alkaline
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Storing Vitamins in the Body • Fat-soluble are generally stored – except vitamin K • Most water-soluble are easily excreted – except vitamin B12 and B6
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Unformatted text preview: Vitamin deficiency occurs when that vitamin is lacking in the diet and body stores are exhausted Toxicity occurs when vitamin intake or storage exceed upper limits Retinal Retinol Retinoic Acid Retinoids Fig. 9.3 Fig. 9.5 Rickets from Vitamin D deficiency Extra Material (Optional) Beta-carotene 2 Retinals Table 1.3 Vitamin D 3- cholecalciferol Table 41.1 Vitamin Requirements of Humans: Fat-Soluble Vitamins Vitamin A Units Vitamin E: -Tocopherol...
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Lecture10 - Vitamin deficiency occurs when that vitamin is...

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