Chapter 12 Vitamins Section 1 fat soluble vitamins Section 2 Water soluble vitamins
Chapter 12 Vitamins • Section 1 Fat Soluble Vitamins • Section 2 Water Soluble Vitamins
Vitamin Vitamin is any of various fat-soluble or water soluble organic substances essential in minute amounts for normal growth and activity of the body and obtained naturally from plant and animal foods Vitamins act as catalysts; very often either the vitamins themselves are coenzymes or they form integral parts of coenzymes
Vitamin • Vitamin is Any of various fat-soluble or watersoluble organic substances essential in minute amounts for normal growth and activity of the body and obtained naturally from plant and animal foods. • Vitamins act as catalysts; very often either the vitamins themselves are coenzymes, or they form integral parts of coenzymes
Classification Vitamins are divided into two groups: fat soluble vitamins and water-soluble vitamins The fat-soluble vitamins include vitamin a.d. e and K The water-soluble vitamins include the vitamin B complex and vitamin c, etc
Classification • Vitamins are divided into two groups: fatsoluble vitamins and water-soluble vitamins. • The fat-soluble vitamins include vitamin A, D, E, and K. • The water-soluble vitamins include the vitamin B complex and vitamin C, etc
Section 1 Fat Soluble vitamins Fat-soluble vitamins are stored in the liver and fatty tissues, and are eliminated much more Slowly than water-Soluble vitamins Diseases caused by a lack of fat-soluble vitamins are rare, but some health problems may decrease the absorption of fat, and in turn decrease the absorption of vitamins a, d, E and K and result in deficiency
Section 1 Fat Soluble Vitamins • Fat-soluble vitamins are stored in the liver and fatty tissues, and are eliminated much more slowly than water-soluble vitamins. • Diseases caused by a lack of fat-soluble vitamins are rare, but some health problems may decrease the absorption of fat, and in turn, decrease the absorption of vitamins A, D, E and K and result in deficiency
Definition of vitamin a Vitamin a is the collective name for a group of fat-soluble vitamins . the most useful form of the vitamin is retinol often called vitamina as it is the active form in the body Retinol (an alcohol can only be found in animal sources and can be converted by the body into retinal an aldehyde and retinoic acid a carboxylic acid), other active forms of vitamin a
Definition of Vitamin A • Vitamin A is the collective name for a group of fat-soluble vitamins. The most useful form of the vitamin is retinol, often called vitamin A1 as it is the active form in the body. • Retinol (an alcohol) can only be found in animal sources and can be converted by the body into retinal (an aldehyde) and retinoic acid (a carboxylic acid), other active forms of vitamin A