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1、食品营养 维生素蛋白质碳水化合物维生素矿物质水脂质1维生素的的功能2维生素的消化吸收3维生素与健康4维生素的食物来源主主讲内容内容合成量合成量 需求量需求量ABCDEK|脂溶性脂溶性维生素：生素：维生素生素A、D、E、K|水溶性水溶性维生素：生素：维生素生素C和和B族族维生素（生素（维生素生素B1、B2、B6、B12、叶酸、泛酸、生物素等）叶酸、泛酸、生物素等）Ultraviolet light from the sun1,25-dihydroxy vitamin D3(active form)In the liver:Ultraviolet light from the sunIn the
2、kidneys:Vitamin D3(an inactive form)HydroxylationFoodsIn the skin:7-dehydrocholesterol(a precursor made in the liver from cholesterol)Previtamin D325-hydroxy vitamin D3HydroxylationUltraviolet light from the sun1,25-dihydroxy vitamin D3(active form)In the liver:Ultraviolet light from the sunIn the kidneys:Vitamin D3(an inactive form)HydroxylationFoodsIn the skin:7-dehydrocholesterol(a precursor made in the liver from cholesterol)Previtamin D325-hydroxy vitamin D3Hydroxylation