nutrition exam #2 Flashcards
drugs that block all fat absorption of fat soluble vitamins
lomitapide, bile acid sequestrants, orlistat, mineral oil
fat soluble vitamins
vit A, D, E and K
normal intake of vitamin A
10 IU beta-carotene, 3.3 IU of retinol
s/s of vit A deficiency
eye issues
- soft corneas
- dry eye
- foamy plaques
- night blind
s/s of excess vit A
- Teratogenicity
- hepatotoxicity
- skin issues
- alopecia
- muscle and bone pain
2 main categories of vit A
retinol – animal derivied
carotenoids – (beta-carotene) precursor found in fruits and veggies
cause of vit A deficiency
- bad diet
- chronic alchohol intake
- lack of yellow, orange, green veggies
vit A dosing
An IU of beta-carotene creates ⅓ the retinol as other vitamin A products
1 RAE = 3.3 IU retinol = 10 IU beta
vit A supplement claims (measles mortality)
measles;
- treatment with 100,000-200,000 IU of vit A helped reduce pneumonia and mortality
- not a replacement for vaccine
vitamin D types
Ergo-calciferol (D3) and Cholecaciferol (D2)
s/s of vit D deficiency
bone issues;
- soft and malformed
- myopathy
- hyperparathyroidism
s/s of vit D excess
- kidney stones
- osteroporosis
- brain issues (seizures)
- heart issues (HTN, bradycardia)
cause of vit D deficiency
- poor intake of dairy, egg
- reduced skin synthesis
- sunscreen use
- older age
- liver/kidney issues
- Decreased bioavailability
– Malabsorption syndromes
– BMI > 30 kg/m2
vit D DDIs
ANTIEPILEPTICS –> that are CYP450 inducers
- phenytoin, carbemazepine
vit D activation
vit d2 –> d3 –> calcidiol –> calcitriol
storage form of vit D
calcidiol
active form of vit D
calcitriol
vit D function in body
regulate calcium uptake in the intestine
down regulate calcium excretion in urine
rickets
vit D deficiency in kids;
- bond deformities and lack of collagen
vitamin E types
synthetic –> need more of this than natural sources bc it is more potent
s/s of vit E defiency
- peripheral neuropathy
- hemolytic anemia
- skeletal myopathy
- ataxia
s/s of vit E excess
- antiplatlet induce bleeding
- diplopia
- fatigue and muscle weak
- N/V/D
vitamin E –> alpha tocopherol
most active form
other forms are tocopherols and tocotrienols
alpha tocopherol function
- Heme biosynthesis
- Antioxidant and free radical scavenger
- Protect cellular mem from oxidation
where is vit E stored?
adipose tissue, liver, muscle
vit E deficiency risk factors
- poor intake of nuts, seeds, whole grains, fatty meals
- disease and drugs that cause poor absoriton
- familial isolated deficiency
vit E claims (hemolytic anemia)
vit E prevents and treats anemia associated with vitamin E deficiency
vit K unique pearl
large quanities not stored in the body
intenstinal absorption requires bile salts
s/s of vit K deficiency
- bleeding
- osteoporosis
s/s of vit K excess
very low risk of toxicity
sources of vit K
- green leaf veggies
- veggie oil
- meat
vit K supplements
natural – vit K1 (phylloquinone)
synthetic – vit K1 (phytonadione)
warfarin
vit K antagonist to prevent clotting
water soluble vitamins
vit C, b1-b2-b3-b6-b9-b12
vit C (other name)
ascorbic acid
vit B1 (other name)
thiamine
vit B2 (other name)
riboflavin
vit B3 (other name)
niacin
vit b6 (other name)
pyridoxine
vit b9 (other name)
folic acid
vit B12 (other name)
cyanocobalmain
microcytic anemia
too few RBC (smaller)
iron and pyridoxine (b6)
macrocytic anemia
too few RBC (larger)
cycanobalmain (b12) and folate
scurvy
widespread bleeding spontaneous
vit C
swollen gums
vit C definciency
beri beri
peripheal neuropathies
thaimine (b1)
wernicke encephalopathy
severe beri-beri with mental confusion
thiamine (b1)
neural tube defect
embryo/fetal abnomatlities
folic acid (b9)
chelitis
cracked, dry corners of mouth
riboflavin (b2)
glossitis
burning and sore tounge
iron, folate, riboflavin (b2), niacin (b3), and cyanocobalmain (b12)
pellagra
dermatitis on hands, feet, neck –> diarrhea, dementia
niacin (b3)
CRAP GPS
- carbamazepine
- rifampin
- alcohol
- phenytoin
- griseofulvin
- phenobarbital
- sulphonylureas
monogram for all drugs interacting with all B-vitamins
loop diuretics
interact with and lead to thiamine (b1) deficiency
Methotrexate, Trimethoprim, and Pyrimethamine interact with?
folic acid –> deficiency
acid suppression medication interact with?
cyanocobalamin (b12) –> deficiency
fluorouracil interact with?
thiamine (b1)
phenothiazines and TCAs interact with?
riboflavin (b2) –> less active form
vit C (ascorbic acid) overview
- required for collagen synthesis
- antioxidant
- reducing agent –> absorption of non-heme
sources of vit C
- acidic fruits
- dark green leafy veggies
- broccoli and bell peppers
s/s of vit C deficiency
- scurvy
- loose teeth
- macular degeneration
adverse effects of vit C
- megadose – kidney stones
- chew-ables – cause dental erosion
thiamine (b1) overview
- meta of glucose, AAs, and lipids
increase in thiamine (b1) when…
pregnant or deficiencies
cause of thiamine deficiency
food with anti-thiamine
- tea, coffee
alcohol use
gastric bypass surgery
foods with high level of thiaminases
- milled rice, raw fish
beri-beri types
dry
- muscle wasting with loss of function
wet
- heart failure with cardiomeagaly, edema, and SOB
Encephalopathy
- disorientation, short term memory loss
riboflavin (b2) needed for
- cell growth
- vision health
- skin, hair, nails
sources of riboflavin (b2)
eggs, organ meats, lean meats
green veggies, milk, cheese
niacin (b3) supplementation used for
prevention and treatment of
- pellagra (derm, diarrhea, dementia)
- hyperlipemia (lower LDL)