Thyroid UK
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Diet and exercise has made my tsh rise. Anyone else?

Hi I've recently lost about 1stone due to diet and exercise over the last 3 months . Previously my thyroid has been stable for years . However since my weight loss I've been prescribed higher thyroxine dose. I don't understand why this has happened . I've started working a lot of night shifts if this has any baring on it?

Any advice/insight welcome

Kola cube

14 Replies
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Was it extreme diet? Restricting calories might cause your body to go crazy which could of course affect your thyroid.

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No just slimming world but I suppose it's very different from how I used to eat .

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Took a quick look. Looks very low on proper fats. That can affect. Proper fats are necessary for producing hormones. Don't know how much you cut off fat but dramatic changes might cause havoc.

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Thanks that's probably it!

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I think things like weightwatchers, slimming world, etc, do work out as pretty extreme diets. You are expected to lose a pound or more per week, Which really is an extraordinary amount. Years ago I did these for a year or more!

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Hi ... I exercise and eat gealthy as well but just dont seem to loose weight... Any suggestions or tips

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I exercised and ate what I thought was healthily for 3 months lost nothing . Joined slimming world and lost nearly a stone in 3 months .

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Kolacube, thyroid function deteriorates over time and dose increases are needed, so it may be coincidental. However exercise and severe calorie restriction deplete T3 levels which causes TSH to rise.

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I am not a medical professional and this information is not intended to be a substitute for medical guidance from your own doctor. Please check with your personal physician before applying any of these suggestions.

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Oh no I'm not very old either . Does it still stand that maximum dose is 200mcg?

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Kolacube, there is no maximum dose of thyroid replacement. Patients are prescribed the dose required to restore euthyroid status ie FT4 in the upper range with low TSH. I have no thyroid and the equivalent of 180mcg Levothyroxine is fine for me. Other members require substantially higher doses.

_____________________________________________________________________

I am not a medical professional and this information is not intended to be a substitute for medical guidance from your own doctor. Please check with your personal physician before applying any of these suggestions.

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When I first started taking it 10 years ago I remember reading that you could only ever take 200mcg max ever and that worried me . It's good to know there is no maximum if needed thanks

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Kolacube, I was told that, too. So, I asked why. And the doctor said : because 200 is the largest pill they make! lol

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Both dieting and exercise can reduce T3, the active hormone, causing TSH to rise in an attempt to make more. Might be that.

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Since you've started working nights do you have thyroid function tests at a different time than you used to? TSH varies throughout the day and night. So if your change in routine (due to night work) has changed the time you get tested, that could account for a change in TSH.

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