VITAMINS part 3 (biotin to sports drinks)

Vitamin B7

Biotin

Other names of biotin

vitamin H, coenzyme R, bios II

Major functions of biotin

* synthesis of purines, pyrimidines, fatty acids, carboxylation reactions
* CHO, protein, & fat metabolism
* maintains nerve, bone marrow, sex glands

Food sources of biotin

yeast, liver, eggs, whole grains, fish

Biotin malnutrition

* delayed growth & devt.
* hearing loss
* ataxia
* seizures

Overt biotin deficiency symptoms

alopcia, conjunctivitis, dermatitis, neurological symptoms

Dietary allowance for biotin

* Adults: 30 mcg/day
* Adolescents: 20-25 mcg/day

Old names of folic acid

Vitamin M, vitamin B12, vitamin Bc, Factor U

Folic Acid Nomenclature

Pteroylglutamic acid

Forms of folic acid

free & conjugated

Major functions of folic acid

* erythropoesis; helps form heme in hemoglobin
* prevents neural spinal defects
* assist in thymine & nucleoprotein formation

Megaloblastic anemia

caused by folic acid deficiency

Folic acid deficiency symptoms

* glossitis
* stomatitis
* GIT disturbances
* anemia

Folic acid toxicity symptoms

* urinary lesion
* uremia

Dietary allowance for folic acid

* 400 mcg DFE/day


* Infants: 160-300 mcg DFE/day

Food sources of Folic Acid

* green leafy veggies
* glandular organs
* legumes

Cobalamin

vitamin 12