Hi there 👋
I've been on dual therapy for the last few years for hypothyroidism, with a stable dose of 25mg t4 and 70mg of t3 (yep, that's not a therapeutic dose of t4 but it keeps them happy 🤷)
My recent annual blood tests came back as borderline under on my t3 levels (2.2, range 2.4-6.0). T4 & TSH suppressed as expected. (In 2021, t3 4.4 with same range).
So they decided to repeat, with additional tests. The t3 is still the same (2.4 same range) but my ferritin is high (214, range 7-150). Everything else is in the normal range (fbc, fasting glucose, urea&electrolytes, cortisol, vitb12, folate, LH, FSH)
I haven't taken any supplementation for over a year, and my diet is not high in iron.
Now I'm terrified that they're going to decide my higher ferritin means I'm over medicated and reduce my t3, even though its showing as borderline - and my fatigue and weight gain in the last 8months are in line with under medicated.
Does anyone have any thoughts as to possible cause or link to higher ferritin? TIA.
Was test done as recommended
Early in morning, before 9am and last dose levothyroxine 24 hours before test..
Day before test did you split T3 and take last 1/3rd or 1/2 of daily dose T3 approx 8-12 hours before test
How old are you….pre or post menopause
Do you have autoimmune thyroid disease?
High ferritin can be caused by inflammation of having Hashimoto’s
High ferritin doesn’t necessarily mean you also have high iron
Medichecks iron panel test
Thanks for the reply...
Bloods at 10am, which is the earliest it can be done in my local hospital & is consistent each time I get it done.Last T4 was 27hrs before.
T3 is split 60%/40% morning/evening and last dose 15hrs before.
Which is consistent with the past few years worth of tests.
Pre-menopausal (& LH & FSH levels were good)
I know I'm autoimmune hypo - after private bloods done for antibodies - but nhs have never taken that into account.
I'd been reading high ferritin can be from acute and chronic inflammation - so it would fit with autoimmune, it was just the hyperthroid link was more well documented.
So you (or your GP) should do full iron panel test to check if iron is also high