Something is causing my FT3 to be +50% (of range) higher than my FT4, but still "Normal".
(TSH is at about 15% of range, FT4 is about +10% from TSH, so it appears that my Thyroid is "following orders" from my Pituitary, I just think I have an abnormally high amout of FT3 compared to FT4 for not being on any medications).
Which of the following sounds like the most likely cause?
- Low Serum Ferritin (6 NG/ML - Range: 25-335)
- Primary Adrenal Insufficiency (High ACTH, low-normal Cortisol, low and "flattened" 24-h saliva rhythm)
- High Estradiol (I heard that Estradiol and T3 both compete for the same receptors - is that true?)
- Low Testosterone with a low LH and FSH (may just be Secondary to high Estradiol)
- My body is just really good at turning T4 into T3...