Thyroxine or T4 is produced by thyroid gland and it is chemically an amine but it acts like a steroid.
It is an iodine-containing hormone that is produced by the thyroid gland, increases the rate of cell metabolism and regulates growth.
As thyroxine is a general metabolic regulator, its deficiency is associated with non-specific signs of ill thrift and poor growth. Other symptoms are weight gain and fatigue.
Manganese in formation of thyroxine
