跟读练习: Vitamin D Testing Challenges - 通过视频学习英语口语

so in this video i want to touch on vitamin d testing challenges okay the big the big problem with vitamin d is that there's no agreed upon value of what you should have in your

blood i mean they have an idea or estimation and we can range all the way from this value right here to this value right here depending on what units you use could range from this value to this

value i guess you can take an average of these numbers depending on what units you're measuring vitamin d from also the institute of medicine will tell you that you need between 600 to 800 IUS

of vitamin d every day yet the endocrinology society will say you need a thousand to 200 IUS every day so again there's this there's not a lot of agreement on how much you need

or how much should be in your blood a couple things i want to talk about that are very very important though there's two forms of vitamin d one is an inactive form 25 hydroxy vitamin d so it's like the precursor to the active

form which is 125 dihydroxy vitamin d so this is the active form this is the inactive form the way this works and by the way most of the vitamin d in your blood is

the pre-inactive version and many times what they're testing is they're testing 25 hydroxy vitamin d they're testing the

precursor or the inactive vitamin d okay put that to the side we'll come back to it so what happens is you have the pre-vitamin d that goes through the body and goes

through the liver and from the liver it then goes to the kidney the kidney is the primary site for conversion of the inactive to the active version of

vitamin d what if there is damage to the kidney you're going to lose your conversion capacity and how many people have damage to the kidney well what damage is a kidney

diabetes is a is a big thing but also insulin resistance what percentage of the population has insulin resistance i would say between

65 to 75 of the entire population that is going to alter the ability for the kidney to convert the inactive to the active

when you get your test back from the lab that says your 5-hydroxy vitamin d is within normal levels well what about the active form are you getting a 100 conversion by the kidney

is there any problem with the kidney that's one variable it's very common to have people with a defect in the vitamin d receptors called polymorphism

and even though you may have normal vitamin d in your blood it's not being activated because at the receptor level it's not working

also if there's not enough bile in the body you won't get the conversion and if there's liver damage you won't be able to produce the bile to make the conversion

if there's no gallbladder there you could be bile deficient so you're not going to have enough bile to make the conversion we already mentioned about insulin resistance if there's inflammation in the body that can lower your ability to convert vitamin d

if there's malabsorption gut problems let's say you had a series of antibiotics as a child and that created scarring of your in your colon that can create a decreased capacity for conversion if

you had a gastric bypass that could also alter your ability to convert vitamin d so as you can see there are many different variables so you have to look at the big picture what i tell people is to err on the side

of taking more vitamin d than less and make sure you have enough bile so you can actually get the absorption all right i hope i didn't add more confusion but i wanted to clear

up some of these variables and the point of this video was just to mention that just because this right here is normal doesn't necessarily mean it's being fully converted

to the active form hey we're back with another amazing recipe no grains no sugar totally keto there's no

suffering in keto absolutely not karen and it's an immune system builder absolutely you have to check this out i think you should hurry up watch the recipe and make it yourself it's just so easy

to be keto but is it simple it's super simple we hope you enjoy making it as much as we are enjoying eating it