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do birth control pills effect thyroid function or readings?

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Old 08-19-2003, 07:36 AM   #1
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kael HB User
Question do birth control pills effect thyroid function or readings?

Someone asked me if being on birth control pills could effect either the function of the thyroid or more specifically, the blood test results when having your levels checked. I know nothing about this, but can anyone here respond for her?


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Old 08-19-2003, 08:54 AM   #2
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aeello HB User

The only thing that I had heard about BCP is that high levels of estrogen can increase your chances of thyroid disfunction.

Old 08-19-2003, 09:20 AM   #3
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Being on Birth Control can affect your lab numbers. I believe it can artificially inflate your t4 numbers. I will look in my thyroid books to get you an exact answer. Can being on birth control cause a thyroid problem?, well let me put it this way I think that adding additional hormones to your body that you do not need wil put additional stresses on your body. Vitamins are depleted, your body is being manipulated by a pill, that we all know has huge risks associated with them. Cancer being one of them.

Old 08-19-2003, 10:26 AM   #4
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Estrogen increases levels of thyroid binding protein, which drops free thyroid levels (the free version of thyroid hormones are what's immediately available for the body's use).

A normal thyroid gland can make up the difference in free levels, but a struggling gland (hypo) may not be able to.

Some posters on site haven mentioned needing to adjust their med dosage after starting bc pills.

[This message has been edited by alviarin (edited 08-19-2003).]

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