-
The body does NOT Metabolize
-
Bioavailability
- rate and extent
- nutrient is absorbed and used
-
Precursors
(or provitamins) are consumed in inactive form and become active vitamins in body
-
Organic nature of vitamins destroyed by ?
- exposure to light,
- oxidation, cooking, and storage
-
Water-soluble vitamins (B vitamins and
vitamin C)
absorbed directly into blood and travel freely
-
Fat-soluble vitamins (vitamins A, D, E
& K)
absorbed 1st into lymph, then blood
-
water soluable vitamins circulate
freely
-
water soluable vitamins are excreeted in
urine
-
fat soluable vitamins may require
portein carriers
-
Fat-soluble vitamins
stored in cells associated with fat
-
B vitamins form coenzymes which ?
- assist enzymes in
- release of energy
-
B vitamins participate
in
- metabolism and cell
- multiplication
-
b vitamins faciliate
energy
-
b vitamins build
- new cells to deliver oxygen and nutrients for energy
- reactions
-
Grains group provides
- thiamin, riboflavin,
- niacin and folate
-
Fruits & vegetables provide
folate
-
Meat
group provides
- thiamin, niacin,
- vitamin B6 and vitamin B12
-
Milk
group provides
- §riboflavin
- and vitamin B12
-
-
riboflavin Easily
destroyed by ?
ultraviolet light and irradiation
-
Thiamin
leaches into
- water
- with boiling or blanching
-
Niacin flush dilates
- capillaries and may be
- painful
-
niacin food sources?
§Milk
- §Eggs,
- meat, poultry and fish
- §Whole-grain
- and enriched breads and cereals
- §Nuts
- and all protein-containing foods
-
RIBOFLAVIN FOOD SOURCES?
- §Milk
- products, including yogurt and cheese
- §Enriched
- and whole grains
§Liver
-
biotin food sources?
- §Organ
- meats, egg yolks and fish
§Soybeans
-
Biotin can also be
synthesized by
intestinal bacteria
-
Pantothenic Acid food sources?
- §Mushrooms,
- avocados, and broccoli
-
-
Folate
- involved in synthesis
- of DNA and formation of new cells
-
Neural
tube defects
spina bifida and anencephaly
-
childbearing women eat
folate
-
Folate may help prevent
cancer
-
-
b12 food sources?
§Meat, fish, poultry, and shellfish
§Milk, cheese and eggs
§Fortified cereals
-
choline?
- Milk, liver, eggs
- & peanuts
-
Vitamin imposters
- substances needed by
- other forms of life but not human beings
-
§Antioxidant in vitamin c?
•Defends against free radicals
- •Protects tissues from oxidative
- stress
-
Collagen is used for ?
- bones and teeth, scar
- tissue, and artery walls
-
vitamin c Works with iron to
form hydroxiproline
- which is needed in
- collagen formation
-
Vitamin C needs increase during
body stress
- infections, burns,
- extremely high or low temperatures, heavy metal intakes, certain medications,
- and smoking
-
vitamin rda for men
90 mg
-
-
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