Vitamins Flashcards
Source of niacin
Tuna
Good source of riboflavin
Milk
Thiamin RDA for men
1.2mg/day
Function of thiamin
Energy metabolism
Thiamin deficiency
Beriberi
Acute - edema
Chronic - muscle wasting
Thiamin toxicity
None known
Source of thiamin
Pork chop
Riboflavin RDA for men
1.3mg/day
Riboflavin function
Energy metabolism
Riboflavin deficiency
Ariboflavinosis
Inflamed eyelids, sensitivity to light, reddening of cornea
Cracks and redness at corner of mouth
Purplish red tongue
Riboflavin toxicity
None reported
Niacin RDA
16 mg/day
Niacin function
Energy metabolism
Niacin deficiency symptoms
Pellagra (sour skin)
4 D’s:
Diarrhea, Dermatitis, Dementia, Death
Niacin toxicity symptoms
Niacin flush
Painful flush, hives, and rash (only with supplements)
Biotin adequate intake
30 g/day
Biotin function
Energy metabolism
Biotin deficiency
Rarely occurs - hair loss, scaly skin
Biotin toxicity
None reported
Biotin sources
Widespread in foods
Role of folate
•Chief Functions:
–Coenzyme in DNA synthesis
–Activates Vitamin B12
Folate RDA
.4 mg/day
Folate deficiency
–Megaloblastic Anemia (large-cell type)
–Mental confusion, weakness, fatigue, irritability, headache
Folate toxicity
Masks vit. B12 deficiency symptoms
Folate source
Lentils
B12 RDA
2.4 micrograms/day
B12 function
Helps to maintain nerve cells
Vit. B6 RDA
1.3mg/day
Vit. B6 function
Transfers amine group to make non essential AA’s
Vitamin B6
•Deficiency symptoms
–loss of some amino acids – can’t make them
–Depression, confusion, abnormal brain wave pattern, convulsions
Vit. B6 •Toxicity symptoms
–Nerve damage causing numbness and muscle weakness leading to an inability to walk and convulsions
Vit. B6 source
Soy burger
B12 deficiency
Pernicious anemia
B12 toxicity
None reported
B12 food source
Animal products
