vitamin D Flashcards
what makes vit D more of a hormone than a nutrient
as not enough can be from food sources most is from a certain light wavelength to help us synthesis vit D
what is the structure of vit d based off of
cholesterol
what form of vitamin is vit D3 and D2
D3 form is animal form , so we syntheisise D3 from and get it from other animals
D2 is what plants synthesis, we can use this but its less biologically efficient than D3
what is 1,25- dihydroxycholecalciferol
dihydroxycholecalciferol is active form of vit D. enabling greater calcium absorption
Calc is for muscle, nerves,
closer to equator means what about amount of vit D
more vit D
explain shadows and vit D
if can see shadow stretched out Infront of you this means sun is low to not good for synthesis of vit D
if shadow is normal height or less then this means sun is higher so just about ok but on the limit for vit D synthesis
whats the main storage from of vit D in body
Plasma concentrations of calcidiol,
explain vit D consumption requirements
> 400 nmol /l Risk of hypercalcaemia
< 20 nmol /l Children with rickets
27 –52 nmol /l Children, winter
50 –100 nmol /l Children, summer
< 10 nmol /l Adults with osteomalacia
20 –45 nmol /l Adults, winter
37 –87 nmol /l Adults, summer
food sources of vit D
egg yolks
cod liver oil
herring
margarine
eggs
ox liver
butter
cheddar cheese
winter milk
summer milk
infant foods are fortified
some cereals are fortified
meats contain some vit D
when should dietary vit D supplements be considered in Scotland
from October to march
vit D RNI for uk for ages 4 and above
the RNI of 10 μg/d (400 IU/d) for those aged 4y and above
safe intakes of vit D for infants and young children
range 8.5-10 μg/d (340-400 IU/d) at ages 0 to < 1y
and 10 μg/d (400 IU/d) at ages 1 to < 4y.
