When pollution is caused by nutrients and fertilizers, this is called nutrient pollution, and it leads to an overproduction of algae and other aquatic plants. This overabundance of plants and algae causes problems, because they cover the water surface and prevent sunlight from reaching the plants underwater.
Reverse T3 is actually an antithyroid -- T3 is the active thyroid that goes to the cells and stimulates energy and metabolism. Reverse T3 is a mirror image -- it actually goes to the receptors, sticks there, and nothing happens. So it blocks the thyroid effect. Reverse T3 is kind of a hibernation hormone, in times of stress and chronic illness, it lowers your metabolism.
I recommend this complete thyroid panel: 1  TSH (Yes it is still helpful to have) 2  Free T3. 3  Free T4.  Reverse 1  T3. Total 2  T3. Thyroid antibodies.  Bottom line: You need more than just your TSH to determine what is actually happening in your body. Make sure that you get a complete thyroid panel when evaluating your thyroid function.