Vitamin D Supplement Potency Varies Widely

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dlb823
dlb823 Member Posts: 9,430
edited June 2014 in Clinical Trials, Research News, Podcasts, and Study Results

If you've had trouble getting your vitamin D level up with supplementation, this might be one of the reasons:

http://www.sciencedaily.com/releases/2013/02/130211162231.htm

"The analysis showed that the amount of vitamin D in these supplements ranged from 9 percent to 146 percent of the amount listed on the label. Not only was there variation among different brands and manufacturers, but also among different pills from the same bottle."

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  • doxie
    doxie Member Posts: 1,455
    edited February 2013

    That's very troubling, but enlightening if someone is having trouble getting their Vit D levels up.  Do you suppose this also extends to food that has Vit D added?   

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  • cp418
    cp418 Member Posts: 7,079
    edited February 2013

    Very interesting.  I believe this may be why the Carlson liquid drops were more effective to increase my Vit D level. 

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  • doxie
    doxie Member Posts: 1,455
    edited February 2013

    I just checked the Vit D brand I am taking, an inexpensive "natural' one available at most drugstores, Walmart, Target, etc.  It is USP tested and verified.  There is a reference to www.uspverified.org  for more information.

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  • johnhunter
    johnhunter Member Posts: 1
    edited March 2013

    Vitamin D gets you calcium to help the body get as much of the nutrients as possible. We all need vitamin D as well as sublingual vitamin D. Try to get it through natural sources. Some of the natural sources are milk, orange juice, spinach and various greens.

    ------------------------------------------

    sublingual vitamin d

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  • mamabee
    mamabee Member Posts: 546
    edited March 2013

    Can folks who are maintaining adequate vitamin D levels post what brand and dosage of vitamin D they are taking? I had gotten my level up to the 40's after taking a 6-week regimen of the prescription high dosage vitamin D, but my level is going down again while taking 2000iu/day. Thanks!

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  • wenweb
    wenweb Member Posts: 1,107
    edited March 2013

    mamabee,  I take Nature Made brand, which has the USP seal on it.  My vitamin D levels went from 30 to 52 in a relatively short time (? 3-4 months).  I take anywhere between 3-5,000iu per day.  That includes the 1,000iu's that in the calcium I take.

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  • mamabee
    mamabee Member Posts: 546
    edited March 2013

    Thanks wenweb! I'll get some Naturemade. I've been using Now Foods Vitamin D, but I'm going to see if another brand helps me maintain an adequate level.

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  • Davy
    Davy Member Posts: 114
    edited March 2013

    I use Country Life vitamin D 2500 iu and take one or two a day. A few months ago my labs showed my blood levels to be around 72. I've used this brand for years.

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