Committee on Food Nutrition: Fat-Soluble Vitamins: Water-Soluble Vitamins

The fat-soluble vitamins in poultry nutrition.

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Fat-soluble vitamins.

Water-soluble vitamins.

 B-complex vitamins and vitamin C are water-soluble vitamins that are not stored in the body and must be replaced each day.  These vitamins are easily destroyed or washed out during food storage and preparation.  The B-complex group is found in a variety of foods: cereal grains, meat, poultry, eggs, fish, milk, legumes and fresh vegetables.  Citrus fruits are good sources of vitamin C.  Us...

Absorption of water-soluble vitamins.

The water-soluble vitamins vary widely in chemical structure and properties, so it is not surprising that the characteristics of absorption of individual members of the group also show differences. Water-soluble vitamins are absorbed mainly into the blood, some very freely (e.g. ascorbic acid), others (e.g. thiamine) only in limited amounts. Vitamin Biz has an apparently unique mode of absorpti...

Absorption of fat-soluble vitamins and sterols

The molecular structure of the four fat-soluble vitamins and of cholesterol, the major intestinal sterol in man, are shown in Figure 1. In spite of the obvious dissimilarities that exist between these compounds they possess one common feature, namely, they are all nonpolar lipids with extremely low solubilities in aqueous media. Because of this, it is convenient to consider them together when e...