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My Vit D levels were 30.9nmol/l back in June, and I was prescribed 20,000IU weekly for 6 weeks, and I have then reverted to 3,000IU per day (GP suggested 800IU but after reading your website I opted for a 3,000IU spray). I was retested at the end of August, and my levels are now 71.2nmol/l – which is classed as "normal" within the UK. I still suffer with fatigue (serum ferritin also low and am taking three iron tablets a day). I have continued taking the Vit D3 spray of 3,000IU daily. My first question is – should I continue this dosage long term? The GP will not retest my levels as they are now within normal limits (above 50nmol/l is the cut-off). My next question concerns my children who are 16, 13 and 10 years. My 10 year old weighs 37Kg. I have been giving them 3,000IU daily, and I just want to check that I am not overdosing them at this dosage? They do not have any diagnosed deficiency, although my eldest has suffered with low mood and fatigue (but could be normal for teenager!). I also give them Omega 3 fish oil capsules which contact DHA & EPA – not sure if this is relevant? Thank you for your help.

Asked by  KF on September 27, 2017

  •  KF on

    See title

    Answered by  KF on
  •  IAW on

    You are still very deficit! This “Council” exists because there is enough information and studies that show current government guidelines for Vitamin D levels are “woefully” deficient. We recommend a “healthy” level of 125nmol/l(50ng/ml). At levels below 40ng/ml(100nmol/l) and your chance for cancer and autoimmune disease rises “dramatically”!!! Just let me say that most doctors know to treat a deficiency with 50,000iu a week and not 20,000iu. Having said that it is better to take a smaller amount of Vitamin D on a daily basis and not weekly.
    Please read http://www.vitamindcouncil.org/about-vitamin-d/vitamin-d-and-other-vitamins-and-minerals/. It is very important!
    So this is what you should do. Take 8000iu a day for eight weeks. If at the end of 8 weeks you feel “fine” drop that down to 5000iu a day and take that “forever”. Do not take any less. IF you are not completely better, come back and tell me.
    Has anyone tested your B12 level? “Vitamin B-12 is indirectly responsible for raising your blood iron level to keep it in a healthy range.” Low Vitamin D can cause anemia and I have also seen many people who test low for Vitamin D also have a B12 deficiency.
    The 10 year old is fine on 3000iu that is what he/she should be taking. The best rule is 1000iu for every 25lbs(12kgs) of body weight. When he/she weighs 100lbs(45kg) then 4000iu.
    So the 13 year old is probably closer to the 4000iu.
    The 16 year old is not taking enough and therefore has symptoms of deficiency. Even if their weight is not 150lbs(68kg), I would still give him/her 5000iu. Vitamin D dose is based on body weight. The 5000iu is based on an average weight of 68kg. So if you, the 13 year old or 16 year old weigh more than that then we have to increase that.
    We do sell at home test kits and I think there is someone else overseas that sells them or does private testing.
    If you do not get better on the 8000iu, then you should try and test to see what your level is. If the 16 year old does not get better than I would also suggest testing after 8 weeks.
    This “stuff” that we call “normal teenage” stuff is really Vitamin D deficiency. https://www.vitamindcouncil.org/vitamin-d-deficiency-associated-with-behavioral-problems-among-adolescents/.
    You really need to try and educate them about the importance of Vitamin D. If you do not once they leave your “site”, the odds they will stop taking it will increase. They will not be able to rely on doctors, as you have seen yourself!
    Let me know if you have more questions!

    Answered by  IAW on
  •  KF on

    Thank you for your quick reply! My 16 year old weighs 69kg, so I will increase his dosage. The spray we have is 3,000IU for one spray, so is it safe for him to have two sprays as this will be 6,000IU? I will increase my daily dose to 3 sprays (9,000IU) for the next 8 weeks and then reduce.
    My haemoglobin level was excellent – 14.6g/dl, which is the highest it has ever been, but my serum ferritin was 9! I very much doubt if the GP will test for B12 deficiency, resources are limited within the UK NHS, but I can start a B12 supplement – do you have any information about how much B12 supplement I should be taking and if it is still necessary considering my Hb level was good? Thanks for all your help.

    Answered by  KF on
  •  IAW on

    Yes, two sprays 6000iu for him. (Better over than under!)
    Since your Hb is good, maybe you want to wait until your 8 weeks is up. If the Vitamin D does not correct the fatigue, then the next thing you should investigate is B12 probably. I am not a doctor so testing would be the easiest.
    If you change your mind “Buy methylcobalamin form (methyl B12).”
    “Choose a sublingual, sprays, or liquid. .” “Adequate amounts of dietary folic acid are vital to keep homocysteine levels in check—but so are adequate amounts of vitamin B12, because folic acid without B12 is impotent.” “The functions of these two B-vitamins are so closely tied, in fact, that they should always be taken together, because too much of one can mask a deficiency in the other.” I would try 500mcg.

    Answered by  IAW on

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