Vitamins Flashcards
Vit A function
vision (maintenance of cornea)
gene expression
protein synthesis and cell differentiation
immunity
reproduction, growth and development
Beta-carotene’s role
Antioxidant
Vit A Def
infections diseases, night blindness, blindness
All epithelial surfaces harden and flatten
Vit A tox
reduced bone mineral density, liver abnormalities
blurred vision, N&V, pressure inside skull, headache
Vit A sources
Retinol, beta-carotene
Retinol sources
milt, eggs, liver
Beta-carotene sources
spinach, leafy greens, broccoli, deep orange fruits
Vit D function
Mineralization of bones
Brain and nerve cells? Muscle cells?
Two forms of vit D
D2 (plant foods form)
D3 (animal foods, synthesized in body)
How does Vit D metabolized?
requires conversions by the liver and kidneys
What is Vit D?
Hormone
Vit D def
rickets (weakening of bones)
osteomalacia (bone softening)
osteoporosis (reduced bone density)
Vit D tox
calcium imbalance (formation of stones and calcification of soft tissues)
Vit D sources
synthesized in body from sunshine
fortified foods, eggs, liver, fatty fish
Vit E function
antioxidant (stabilization of cell membranes)
protects lungs
reduce LDL
Vit E def
erythrocyte hemolysis
nerve damage
loss of muscle coordination
impaired movement, vision and speech
Vit E tox
hemorrhagic effect (blood clotting)
Vit E sources
plant oils, green leafy veg, wheat germ, whole grain, nuts, seeds
Vit K function
synthesis of blood clotting proteins and bone proteins
What vitamin injection do infants get at birth?
vit K
Vit K def
hemorrhage
fat malabsorption
Vit K sources
synthesized in body by GI bacteria
green leafy veg
cabbage
veg oils
What vit can be synthesized in the body?
D and K
Thiamin function
part of coenzyme used in energy metabolism
Thiamin (b1) def
Beriberi (edema or muscle wasting)
Anorexia and weight loss
neurological disturbances
muscular weakness
heart enlargement and failure
Thiamin (b1) sources
enriched, fortified or whole grain products
pork
Riboflavin function
part of coenzymes used in energy metabolism
Riboflavin (b2) def
inflammation of the mouth, skin, and eyelids
sensitivity to light
sore throat
Riboflavin (b2) sources
milk products, enriched fortified whole grain products
liver
Niacin function
part of coenzymes used in energy metabolism
Niacin (b3) def
pellagra (diarrhea, dermatitis and dementia)
Niacin (b3) tox
niacin flush, liver damage, impaired glucose tolerance
Niacin sources
milk, eggs, meat, poultry, fish, nuts
Biotin function
part of a coenzyme used in energy metabolism
Biotin def
skin rash, hair loss, neurological disturbances
Biotin sources
GI bacteria synthesis
Found in most foods
Panthothermic acid function
part of coenzyme used in energy metabolism
Panthothermic acid def
digestive and neurological disturbances
Vit B6
Part of coenzymes used in amino acid and fatty acid metabolism
Vit B6 def
scaly dermatitis, depression, confusion, convulsions, anemia
Vit B6 tox
nerve degeneration, skin lesions
Vit B6 sources
meats, fish, poultry, potatoes, legumes, liver, soy
Folate function
activates B12, helps synthesize DNA for new cell growth, protects nerve cells
Folate def
anemia
smooth red tongue, mental confusion
Folate tox
masks vit B12 deficiency
Folate sources
fortified grains, leafy green veg, seeds, liver
Vit B12 function
activates folate
helps synthesize DNA for new cell growth, protects nerve cells
Vit B12 def
anemia, nerve damage, paralysis
Vit B12 sources
Animals
Vit C function
synthesis of collagen, carnitine, hormones, neurotransmitters, antioxidant
Vit C def
survy (bleeding gums, pinpoint hemorrhages, joint pain)
Vit C tox
diarrhea, GI distress
Vit C sources
citrus fruits
cabbage veg
dark green veg
lettuce
tomatoes
mangoes