The function of the thyroid gland is to take iodine, found in many foods, and convert it into thyroid hormones: thyroxine (T4) and triiodothyronine (T3). Thyroid cells are the only cells in the body which can absorb iodine. These cells combine iodine and the amino acid tyrosine to make T3 and T4. T3 and T4 are then released into the blood stream and are transported throughout the body where they control metabolism (conversion of oxygen and calories to energy).
A chart of average weight of women at various ages, in pounds and kilograms. The average female American womens weight is somewhere between 60 to 72 kilograms, depending on age.( for white females* in this table). Created by Steven B. Halls, MD, FRCPC and John Hanson, MSc.
1 Modern American women are an average 166.2 pounds, while the typical man in the 1960s was 166.3 pounds. 2  The weight gain has been blamed on Americans overeating unhealthy foods and scaling back on exercise.  During the same period, men put on an average of 30 pounds.