Rachel: And sometimes emails from practitioners provide me with both the question and their own answer to their question even!
Cameron Barker’s (Ex-student long-term learner & mentee) email arrives titled: Unexpected Source of Iodine in Placenta Caps?!
A 32 yo female with a 12-week-old daughter came to me as she was not feeling well, in particular, she reports fatigue, racing heartbeat, anxiety and loss of appetite. Previously, 2 years ago, I had helped her with her Hashimoto’s. I did not hear from her for a year or so and she fell pregnant and was recommended to take a well-known iodine-containing pregnancy multi.

When she represented in this early postnatal period, she provided me with TSH, free T4 and free T3 results which include her cumulative historical gestation values. I could see that her TSH has dropped from 2.28 late in pregnancy to now 0.17mUI/L. Additionally, her free T4 went from 10.1 to 21.9 pmol/L and her postnatal T3 was 7.0 pmol/L! I wrote to her GP advising, “I am concerned that she has transitioned into hyperthyroidism and has to wait for 3-6 months to see an endocrinologist.:

I told her to stop any source of Iodine in the meantime and at this time I was unaware she was taking placenta caps.

In response to my letter, her GP organised some testing and with some guidance from me, we ensured that she followed the best collection conditions protocols e.g fasting etc. Check out the Random urinary iodine results for someone “not taking any iodine”
Random Urine Iodine
R-U-Creatinine 2.2 mmol/L
Urine iodine 100 L ( >100 ) ug/L

Creat Corr. Iodine 377 ( >100 ) ug/L
Thyroid Antibodies
Thyroid Peroxidase Ab 416.9 H ( <5.6 ) IU/mL
Thyroglobulin Ab 23.8 H ( <4.1 ) IU/mL
TSH Receptor Antibodies <0.9 ( <1.8 ) IU/L
Thyroid Stimulating Immunoglobulins 0.13 ( <0.55 ) IU/L
Thyroid Function Tests
Free T4 21.4 H ( 9.0 – 19.0 ) pmol/L
Free T3 8.4 H ( 2.6 – 6.0 ) pmol/L
TSH 0.01 L ( 0.3 – 3.5 ) mIU/L

I could not work out why her Iodine levels were so high and as soon as she sent me all these results I called her straight away and told her to not take the multi anymore but apparently, she was taking her own placenta capsules and did not think to tell me…  I came across this study:  https://pubmed.ncbi.nlm.nih.gov/21417918/#:~:text=Iodine%20content%20of%20tissue%20samples,1037%20ng%2Fg%20thyroid%20tissue  I am guessing placenta is a good source of Iodine. Have you come across this before? I will definitely keep this in the back of my mind from now on.

Rachel’s reply: OH MY LORDY Cameron this is extraordinary!!🤯  Thank goodness she came to see you – I really hope she’s getting some relief from her hyperthyroid sx now…because that’s an awful thing to deal with on top of a new baby!

And thanks for the tip-off – placental capsules as a potential source of iodine is now firmly on my radar too for all these new mums with wobbly TFTs and potential PPT and….the Jod-Basedow effect to boot!!!🤓
Cameron: The patient is feeling a lot better already and her symptoms were quite mild compared to what I expected. I think I caught it just in time!! As always, thanks for the great content and for being a fantastic silent mentor for me.
Me? Silent?  Well, that’s a first….😂

Have you heard about The UU30 The Thyroid Collective? Over more than a decade, Rachel’s work in thyroid health has gained an enormous following & an impressive reputation for its excellence in quality practitioner education. You may have up-skilled alongside Rachel, undertaking her substantial MasterCourse II in Thyroid & Adrenal Diagnostics or completed smaller instalments on an as-needed basis. Either way, this collection of 10 Update in Under 30 episodes provides you with your very own library of thyroid resources & research summaries on a juicy selection of thyroid presentations, investigations and treatment approaches. These are not new episodes but a curated collection of those previously released which have been reviewed to ensure they stand up in the context of all the new research and we can officially declare them – ‘good to go and full of gold!’

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