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Hi, this is my first post here.
I took a thyroid test on my own (ordered a test kit online) because I suspected my symptoms looked similar to hyperthyroidism. It turned out my free T3 is low - 1.9 with the normal range being 2.5-6.5. My free T4 and TSH are normal, both in the middle of their normal ranges. TPOab is also OK - 31 with the normal range 0-31. The test didn't include rT3 or anything else.
I've had symptoms for over 8 months now including tiredness, chest tightness, palpitations, muscle pain, nausea, diarrhea, sleep issues. These symptoms are usually triggered by food, anxiety, or too rigorous exercise. It was pretty bad in the beginning, but by now many of these symptoms have greatly improved.
I had one episode of near syncope when running which prompted my visit to Emergency and started all of this. At the time I was rigorously training for ultramarathon and was quite possibly in over-training state. They suspected a heart attack but it turned out to not be the case. I had several different heart tests that didn't find anything wrong with my heart. I have bradycardia, occasionally down to 40 bpm, and have had a few episodes of low BP, although this could be explained, at least in part, by me being a fairly good runner and taking beta blocker since that syncope episode.
The reason I am taking beta blocker medication is because initially I had some unexplained sharp HR spikes when running and a couple of episodes of A-fib, as well as panic attacks, and a lot of anxiety. This puzzles me because these symptoms are rather consistent with Hyperthyroidism.
Other than a minimal dosage of beta blocker I am not taking any medications. I take a bunch of supplements. I've also switched my diet to low histamine diet because I thought I developed Histamine intolerance. The diet change had helped a lot with my symptoms.
One last detail is that my liver enzymes are slightly elevated and continue to raise. I did liver ultrasound several months ago which didn't reveal anything abnormal.
So I wonder does this look like Hypothyroidism? Could this be T4 to T3 conversion issue due to stress, overtraining, and nutrition? I read that sluggish T3 could affect liver detoxification which further affects T4 to T3 conversion. Does anyone has any experience with that?
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