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Thyroid more effective in the summer?

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Old 09-14-2008, 03:23 AM   #1
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Thyroid more effective in the summer?

I read recently on a Thyroid advice website that the thyroid is more effective in the summer. Has anyone else out there heard of this? It didn't actually say why it was more effective in the summer .. more sunlight ..? longer daylight hours .. ? Would be interested to hear peoples thoughts.

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Old 09-14-2008, 05:06 AM   #2
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Re: Thyroid more effective in the summer?

At least many people here up north have noticed that their hypoT symptoms get worse during winter to be relieved again in the summer. Some hypoT patients switch their medication to "winter gear" in the fall and back to "summer gear" in the spring. It's the air temperature that mainly does that - cold weather slows the thyroid down and warm weather does the opposite. There's a Finnish professor who strongly believes that the "spring fatigue" - that at least many Finns have - is caused by long term cold exposure to the thyroid - it's just tired after having to push extra hard during cold winter months. Also more daytime light has something to do with this - I believe that happens also through other hormones produced by the brain.

Last edited by FinnMaid; 09-14-2008 at 05:10 AM.

Old 09-16-2008, 05:31 AM   #3
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Re: Thyroid more effective in the summer?

Thanks for that - I find that really interesting. Now I am wondering if the air temperature might go some way to explaining why, on a couple of occasions over the last few years, when I have gone for my routine thryoid blood tests, that my TSH has been considerably lower than normal, (even though I have been on same level of meds for a couple of years) and on both occasions it was immediately after I had returned from a holiday in a warm and sunny place - well warmer and sunnier than England that is!!!

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