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  • Vitamin D Supplements Lower My Thyroid Levels --- What's Going On?

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    Old 03-15-2014, 06:05 PM   #1
    Roadster42
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    Vitamin D Supplements Lower My Thyroid Levels --- What's Going On?

    I am a 40-year-old male. I was diagnosed with autoimmune hypothyroidism in the summer of 2009. At the same time, I was diagnosed with Vitamin D deficiency.

    During the past five years, every time I took Vitamin D supplements, the thyroid-hormone levels in my blood decreased significantly, and my hypothyroidism symptoms (sensitivity to cold, pain in hands and feet, etc.) got worse. When I stopped taking the Vitamin D supplements, the thyroid-hormone levels increased, and my symptoms got better.



    Here is an example:

    In mid-May 2010, I had been taking levothyroxine (137 mcg) every day for 2.5 months. I had thyroid blood tests and a Vitamin D blood test, and the results were as follows:

    TSH = 0.636, normal range = 0.350 - 5.500

    FREE T4 = 1.13, normal range = 0.71 - 1.81

    FREE T3 = 3.4, normal range = 2.3 - 4.2

    Vitamin D, 25-hydroxy = 26, normal range = 32 - 100


    In late May 2010, I started taking Nature Made Maximum Strength D Vitamin. I took 2000 IU per day, about 4 - 5 hours after taking my thyroid pill.


    In mid-June 2010, I had more thyroid blood tests, and my Free T4 and Free T3 were much lower than one month earlier.

    TSH = 0.876, normal range = 0.340 - 5.600

    Free T4 = 0.95, normal range = 0.71 - 1.81

    Free T3 = 3.1, normal range = 2.5 - 3.9


    My then-endocrinologist switched me to Synthroid (137 mcg 4 times per week, and 150 mcg 3 times per week). Unfortunately, the vitamin D interfered with the Synthroid as well. After I stopped taking the Vitamin D, the Free T4 levels recovered, and the Free T3 levels *somewhat* recovered.



    Later on, I took a different Vitamin D supplement, Bluebonnet Vitamin D3. I took 1000 IU per day, about 4 - 5 hours after taking my thyroid pill. The results were the same as before, and I stopped taking the supplement.

    I later took the Bluebonnet supplement only three times a week, 12 hours after my thyroid pill. The results were the same as before, and I stopped taking the supplement.



    So, what's going on here? Why are Vitamin D supplements lowering the thyroid-hormone levels in my blood? Which Vitamin D supplement (if any) will NOT lower my thyroid-hormone levels?

    Unfortunately, my doctors (primary doctors and endocrinologists) don't have any answers to these questions.

    My last Vitamin D blood test (from mid-December 2013) showed a result of 8 (normal range = 32 - 100). So, I need some answers to my questions as soon as possible.

    I appreciate any help you can give me. Thank you.

     
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    Old 03-16-2014, 05:27 AM   #2
    sammy64
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    Re: Vitamin D Supplements Lower My Thyroid Levels --- What's Going On?

    If you were taking the NatureMade 2000IU gel caps, I can understand why they caused problems. They are soy-based and soy is known to be a potent thyroid inhibitor.

    I don't know about Blue Bonnet brand but, if that, too, contains soy, you just might have your answer.
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    Graves' 2007...remission 2009....hypo 2010

     
    Old 03-16-2014, 10:45 AM   #3
    Roadster42
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    Re: Vitamin D Supplements Lower My Thyroid Levels --- What's Going On?

    I knew that Nature Made contained Calcium (dibasic calcium phosphate), and I knew that Calcium was a thyroid inhibitor as well. I bought BlueBonnet because there was no soy or calcium listed on the BlueBonnet label.

    According to the label, BlueBonnet contains the following:

    Vitamin D3, 1000 IU, cholecalciferol from natural lanolin
    100% Kosher vegetable capsules, vegetable cellulose, vegetable magnesium stearate
    *Free* of milk, egg, fish, crustacean shellfish, tree nuts, peanuts, wheat, and soybeans.
    Also free of yeast, gluten, barley, rice, sodium, and sugar.

    Last edited by Administrator; 03-16-2014 at 02:29 PM.

     
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