VDC test kit slider
VDC-Banner-new_468
VDC test kit slider
sunfriend-banner
sperti logo 1
Text size A A A
High contrast on off

Information on the latest vitamin D news and research.

Find out more information on deficiency, supplementation, sun exposure, and how vitamin D relates to your health.

Dear Vitamin D Council, I am a 35 year old male of 152 lbs who has become interested in the debate around vitamin D, and want to thank you for a lot of interesting information in this regard. I recently tested my vitamin D level with my doctor, which showed 29 ng/ml. Since last week I have been taking 5000IU every day in order to bring it up to your recommended level of between 40 and 50 ng/ml. I would like to take a new blood test in some time to confirm that this level has been reached. Just wondering, however, how long I should expect this to take, and thus when it would be appropriate for me to do the new blood test? Also wondering; when I have reached a level of between 40 and 50 ng/ml, would you recommend me to continue with 5000IU every day, or should I rather take a smaller "maintenance dose"? And my last question; would you recommend me not to take vitamin D supplements on days where I stay out in the sun a lot? All the best, Peter

Ask the Vitamin D Council

Asked by  pettereng19903500 on April 4, 2016

Answers

  • pettereng19903500
    Participant
     pettereng19903500 on

    See title

    Answered by  pettereng19903500 on

  • IAW
    Participant
     IAW on

    Compared to most people your level is not too bad. (I wonder what latitude you live at? Do you take any supplements that have some “D” in them?) Just so we are clear though, it is better for you to have a level as you mentioned above of a minimum of 40-50ng/ml. Now if you take 5000iu a day you will probably end up with a level of 60ng/ml which is fine. This is because you are already starting at a level of almost 30ng/ml see https://www.vitamindcouncil.org/further-topics/i-tested-my-vitamin-d-level-what-do-my-results-mean/. The 5000iu keeps most average weight people around the goal.
    You will have to be the judge if you want to “cut back” if you are out in the summer sun a lot. If you do not, your blood levels will go higher but at 5000iu, it will probably not cause you any problems. If you work indoors during the week and get no mid day sun, you might just want to not take any D on the weekends when you are out.
    As for a retest unless you have health problems (do you??), take certain medications or have some kind of digestion issues (malabsorption), your levels should increase. So you could give it six to eight weeks and retest just keep in mind we are headed into spring/summer and your level may also reflect some “natural D”.

    Answered by  IAW on

  • pettereng19903500
    Participant
     pettereng19903500 on

    Thank you so much for this informative reply and for the link to the very useful website indicating the need dosage of vitamin D! I would not like to go higher than 50 ng/ml. In addition to my softgels of 5000IU per day, I am also taking cod liver oil of 400IU per day (which I would like to continue with because of the Omega-3 and the vitamins A&E), in addition to eating fat-rich fish at least a couple of times a week as well as other foods containing some vitamin D. This means, I guess, that I should reduce my intake a bit in order not to exceed 50 ng/ml. In your experience, could I then continue to take the 5000IU pills, but only take them four days a week instead of seven, for instance? Or is it preferable to find a pill with some less IU and take it every day?

    Once I reach a level of between 40 and 50 ng/ml, what would be your recommendation for me to take daily in order to stay at that level? My weight is 152 lbs.

    Another question too. Say that I keep my level of vitamin D between 40 and 50 ng/ml throughout the autumn, winter and spring by way of supplements (I live at 60*N). Then summer comes. If I then spend a lot of time outside, would there be a risk that the sun, given my baseline of 40-50 ng/ml, would bring me up to a level where I would not want to be, even though I skip supplements in the summer / on sunny days? I live on 60 degrees northern latitude.

    Thanks a lot and all the best, Peter

    Answered by  pettereng19903500 on

  • IAW
    Participant
     IAW on

    Dr. Cannell once said to never exceed the RDA for preformed Vitamin A. Too much preformed (retinol) Vitamin A is not good for you. So I do not know how much is in the amount of cod liver oil you are taking. So check.
    The 5000iu a day that we recommend gets most average weight people to a level of around 50ng/ml. The link above approximates what to do starting at a given level. So for you it would seem somewhere about 2000 or 3000iu a day (??) would get you to a level of 40-50 under your present circumstances. It is better to take Vitamin D on a daily basis. So I do not know how many 5000iu’s you have left but I believe in not being wasteful. So you could get the 2 or 3’s start using them and once or twice a week throw in a 5 to use them up. (Since you are starting at a higher Vitamin D level the 5000iu is not needed. The 2-3 should get you there.)
    So in theory you make it to exactly 50ng/ml. You keep taking the supplements and get sunshine your levels will increase beyond 50. So in your case you can probably stop the Vitamin D 2 or 3000 you would be taking, add sunshine and still maintain. Come the beginning of September add the supplement back again. I do not know if this helps with a perspective. For example you make it to 50, stop the supplement and do not get any sunshine, in two weeks your level will be about 1/2 at 25. Yours will go back to 30 since you are getting some Vitamin D on the side.
    Since you did not answer the question, I will assume you are totally healthy, with no issues or some of my answers would be different.

    Answered by  IAW on