module 8 water soluble vitamins Flashcards
what are examples of water-soluble vitamins
b complex
niacin
what are characteristics of vitamins
work as coenzyme
non toxic
not stored (except B12 in liver)
excess excreted in urine
what is the function of thiamin
required as a coenzyme involved in energy production
what is the RDA value for thiamin
very small
1.1/1.2 mg/day
what is the thiamin deficiency called
beriberi
what are symptoms of beriberi
muscle weakness
neurological changes
thingling, numbness
depression
what does beriberi look like in the western world
alcoholism
1. B1 is needed as a coenzyme for enzyme involved in alcohol breakdown
2. lower absorption of B1
3. tend to have poor diet
what is the function of riboflavin (B2)
part of 2 coenzymes: FAD, FMN
involved with glucose and FA making energy (Kcal)
what is riboflavin deficiency
riboflavnosis/angular stomatis
cracking at corners of the mouth
what is the RDA value for riboflavin
1.1/1.3 mg/day
what is the function of niacin (nicotinic acid)
part of 2 coenzymes: NAD and NADP
what is a food source of niacin
corn
what is the niacin deficiency called
pellagra
what does pellagra do
weakness
dermatitis
diarrhea
dementia
what is 1 niacin equivelent (NE)
1mg niacin
= 60mg tryptophan
what are different forms or vitamins of B6
pyridoxine
pyridoxal
pyridoxamine
what are the B6 vitamins covered to
PLP
pyridoxal phosphate
what does PLP do
coenzyme in reactions of protein and amino acid metabolism
formation of heme ring
what can the conversion of tryptophan with the enzyme B6 attached turn into
niacin
serotonin
what does estrogen do
increase activity of enzyme that converts tryptophan -> niacin
what are symptoms of B6 deficiency
abnormalities in protein and AA metabolism
re: heme ring
what are the B6 deficiencies
microcytic
hypo chronic
anemia
(pale tiny RBC)
what is the RDA value for vitamin C
75/90 mg/day
what is the key function of vitamin C
reducing agent (donate e)
