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  1. #1
    Steve Freides is offline Senior Member
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    Default Vitamin D, anyone?

    What is a proper vitamin D level, as evidenced by a blood test, seems to be the subject of at least some controvesy. I recently asked to have mine tested (after having had blood drawn and sent to the lab for another purpose) and the results indicate that my Vit D level is less than what's considered optimal.

    Quote Originally Posted by http://en.wikipedia.org/wiki/Vitamin_D
    Measuring vitamin D status

    The serum concentration of 25-hydroxy-vitamin D is typically used to determine vitamin D status. It reflects vitamin D produced in the skin as well as that acquired from the diet, and has a fairly long circulating half-life of 15 days. It does not, however, reveal the amount of vitamin D stored in other body tissues. The level of serum 1,25-dihydroxy-vitamin D is not usually used to determine vitamin D status because it has a short half-life of 15 hours and is tightly regulated by parathyroid hormone, calcium, and phosphate, such that it does not decrease significantly until vitamin D deficiency is already well advanced.[5]

    There has been variability in results of laboratory analyses of the level of 25-hydroxy-vitamin D. Falsely low or high values have been obtained depending on the particular test or laboratory used. Beginning in July 2009 a standard reference material became available which should allow laboratories to standardise their procedures.[5]

    There is some disagreement concerning the exact levels of 25-hydroxy-vitamin D needed for good health. A level lower than 10 ng/mL (25 nmol/L) is associated with the most severe deficiency diseases: rickets in infants and children, and osteomalacia in adults. A concentration above 15 ng/ml (37.5 nmol/L) is generally considered adequate for those in good health. Levels above 30 ng/ml (75 nmol/L) are proposed by some as desirable for achieving optimum health, but there is not yet enough evidence to support this.[5][38][39]
    Mine was 25.

    This was in the news a couple of weeks ago here as well, a review of existing studies concluded that levels above 30 aren't yet proven to be worthwhile - yet there seem to be many folks who think one ought to strive for that, including my mother's doctor, I've noticed.

    Comments?

    -S-
    KBNJ.COM - Steve Freides, RKC Team Leader

  2. #2
    Dano3000 is offline Senior Member
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    Default

    Too much supplemental vitamind D, for me, causes unrelenting constipation, fatigue, and joint pain. Hypercalcaemia is not fun.
    Yes, its popular. Yes, deficiency is common in our outside hating society. But there is still too much of a good thing. Sun will always be the best source of D, in my opinion.
    Work with your doctor to correct your deficiency. Only blood work should show you how much D you should take.

  3. #3
    Steve Freides is offline Senior Member
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    Quote Originally Posted by Dano3000 View Post
    Work with your doctor to correct your deficiency. Only blood work should show you how much D you should take.
    Right, but that's what's up in the air - no one says that my Vitamin D level is insufficient as it is, although there seems to be some as yet unsubstantiated thought in that direction. That's why I asked.

    My doctor said I could take supplemental Vitamin D if I wanted but that I didn't have to.

    -S-
    KBNJ.COM - Steve Freides, RKC Team Leader

  4. #4
    Dano3000 is offline Senior Member
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    Sorreh, I guess I interpreted wrongly. I thought you were using the quote to show why you wanted to reach a blood level of 30 or more.
    I can't really say what it should be at because I don't know myself. If you feel objectively better taking D, do so.

  5. #5
    HeaT is offline Member
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    Default

    sunlight is the best source of vit d

  6. #6
    Semonides is offline Senior Member
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    you fellows keep saying that sunshine is the best source of D. That's true, but I heard that you have to walk around almost naked in order to absorb enough sun to get your D. Since the sun hitting your head and forearms isn't enough to get what you need and since you don't walk around in a pair of speedos, you are good candidates from supplements.

    Coincidentally I have been taking D for a while now. I have been taking it since I heard that the Germans used it early in the Olympics (c. 1901) as a PED. I figured, what the hell? So I've been taking 30,000 I.U. for an extended period. Since I don't for hypertrophy I am not seeing any change on the musculature front, but I always recover well and I never get sick. As a matter of fact, I can feel it when I miss a dose of D because sickness starts setting in: my throat gets stratchy and my sinuses start to congest. As soon as I get back on the D, I clear up. Therefore I cannot say whether or not D is actually anabolic, or at least isomorphic to anabolic, but it does give my immune system a nitro boost.

  7. #7
    Steve Freides is offline Senior Member
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    Wow, 30,000 IU is a _lot_. 4000 IU is the currently recommended maximum doseage for a healthy adult.

    Do you find (I guess not, but I have to ask) it gives any digestive problems? That's the most common issue I can find.

    Very interesting - 30,000 IU. What size/format do you take it in? The biggest I've seen is 1000 IU capsules and tablets, and that would mean taking 30 per day. Do you take it with other food, and how do you spread it out during the day?

    Thanks.

    -S-
    Flexibility Guide from kbnj.com

  8. #8
    Semonides is offline Senior Member
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    I use 5000 I.U. capsules and have two in the morning, two at midday, and two at night.

    I was doing some reading about the 4000 I.U. recommended dosage and it seemed that FDA was saying that the only solid evidence they had pertained to 4000 I.U. dosages. Therefore they conservatively are not talking beyond the evidence, even if a higher dosage might be beneficial.

    Anyway, no I never have any digestion problem (as long as I stay away from garlic). I do take it with food, particularly with fat because I heard that D needs the presence of fat. So I make sure I eat some nuts or an avocado or coconut oil with the D.

    By the way, I think that D starts getting toxic around 50000 I.U., so I am a good twenty thousand below that.

  9. #9
    Steve Freides is offline Senior Member
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    Very interesting, Comrade Semonides - thanks for the info.

    -S-
    KBNJ.COM - Steve Freides, RKC Team Leader

  10. #10
    Andy Alexander RKC is offline Senior Member
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    Steve,
    Here's some info from Dr. Mercola. You might have to register on the site, not sure.
    Vitamin D Update – Carole Baggerly and Dr. Cannell

    He's pretty adamant about getting enough D and is also very upset, as are others who study the vitamin D issue, about the recent government recommendations for D.

    aa

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