Vitamins

Chapter 10 Assignment

Describe the functions of each of the following B vitamins and list their sources:

1.Thiamin:

Functions- used in energy metabolism, nerve activity and muscle activity in response to nerves also depend on thiamin.

Sources- Whole grain, fortified, or enriched grain products; moderate amounts in all nutritious foods; pork

2. Ribflavin

Functions- used in energy metabolism

Sources- milk products; whole grain, fortified, or enriched grain products; liver

3. Niacin:

Functions- used in energy metabolism, central in energy transfer reactions, especially the metabolism of glucose, fat, and alcohol

Sources- Milk, eggs, meat, poultry, fish; whole grain, fortified, or enriched grain products; nuts and all protein containing foods

4. Biotin

Functions- used in energy metabolism, fat synthesis, amino acid metabolism, and glycogen synthesis

Sources- Widespread in foods; liver, egg yolks, soybeans, fish, whole grains, also produced by the GI bacteria

5. Pantothenic Acid

Functions- used in energy metabolism, involved in more than 100 different steps in the synthesis of lipids, neurotransmitters, steroid hormones, and hemoglobin

Sources- Widespread in foods; chicken, beef, potatoes, oats, tomatoes, liver, egg yolk, broccoli, whole grains

6. Vitamin B6

Functions- used in amino acid and fatty acid metabolism; helps to convert tryptophan to niacin and to serotonin; helps to make red blood cells

Sources- Meats, fish, poultry, potatoes and other starchy vegetables, legumes, noncitrus fruits, fortified cereals, liver, soy products

7. Folate

Functions- used in DNA synthesis and important in new cell formation

Sources- Fortified grains, leafy green vegetables, legumes, seeds, liver

8. B12

Functions- used in new cell synthesis; helps to maintain nerve cells; reforms folate coenzyme; helps break down some fatty acids and amino acids

Sources- Foods of animal origin (meat, fish, poultry,...