I am looking for research on the link between CO Poisoning and Hypothyroidism. I work in a CO Plant where we make large sums of CO. About 3 years ago at my plant physical, my TSH levels were at high levels. 3 other employees in my same unit had the same problem. Out of 12 employees, 4 of us had our thyroids shutting down. The plant physician said hypothyroidism. But I think this is wrong. A pathophysiologist whose specialty is pulmonary, said it was probably CO poisoning. But I am having problems finding proof to back this up. I am sure studies are out there. But I haven't found them. Anybody who can help steer me in the right direction. I would greatly appreciate it. Or can support this line of thinking would be great.