Thyroid UK
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When To Take Supplements

Good Morning all 😊

Sorry I have no recent blood results to post today, but I'v switched from Levo after 20 years to t3. Have been taking t3 split into 3 doses for the past 10 weeks. I take gentle iron before bed as advised so caffeine doesn't interfere with the absorption. I want to add selenium and magnesium daily but not sure if I can take alongside iron at bedtime. Can anyone enlighten me please.

3 Replies
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Now, that's going to be difficult... No, you can't take selenium and magnesium with iron - you can't take anything with iron except vit C.

And iron has to be taken 4 hours away from T3.

Magnesium has to be taken 4 hours away from T3.

And selenium 2 hours.

And all three of them away from each other.

Do you really need to take your T3 in three doses?


Thanks for advice grey.

Looks like it will be difficult then 🙈

After speaking to on pm grey I did take all t3 at once and my heart palpitations and sweats got me throughout the day all day 😩 So I went reduced by a quarter and went back to splitting again.


Could you not try splitting into two doses?


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