Cortisol blocks 5-deiodinase, the enzyme that converts the thyroid hormone T4 into the active form T3, which is essential for hormone synthesis from cholesterol, and regulation of metabolism

Cortisol releasing hormone (CRH) also blocks thyroid stimulating hormone (TSH)
This leaves the body with more T4 over T3, the T4 can be metabolized into reverse-T3 instead, which then further inhibits the activity of T3

This process acts as a safeguard to conserve resources during starvation for example, but now it's also activated by chronic inflammation
In many cases thyroid issue actually stem from adrenal issues

Unfortunately many MDs don't even take this into consideration, lab work and prescriptions are often based solely on factors like TSH, which are fairly useless without CRH and cortisol for comparison
Sunlight is crucial once again here, the red/infrared light in sunlight triggers cortisol breakdown

Compounds formed in response to sunlight like vitamin D and melatonin (the master regulators of the hormone system) also prevent excess cortisol by promoting leptin sensitivity
Beyond that, preventing inflammation comes down to avoiding triggers, this thread is a good place to start https://twitter.com/ck_eternity_/status/1266433318536568835?s=19
You can follow @ck_eternity_.
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