I've used Kratom daily in high doses for about a year. I decided to quit a while ago, which I did yesterday. Coincidentally I had my TSH checked, because I've had a hypothyroidism for a long time, and even though I take L-Thyroxin every day (at a dose that worked before Kratom), my TSH is now 13,8! I'm a bit shocked. So, Dr. Golden, my question is,is this state reversible once the Kratom is out of the system or have I damaged my thyroid irreversibly?