Guaranteed income supplement. Seniors may be eligible for the guaranteed income supplement (GIS), which is a monthly benefit paid to residents of Canada who receive a full or partial OAS pension. If a senior is single, his or her income should be below $14,352.
TSH (thyroid stimulating hormone) increases the activity of the Sodium-Iodine Symporter (NIS) that drives iodine into the thyroid and into the cells of the other organs. That is the reason that the TSH blood levels increase when patients are taking iodine â the TSH is needed to drive iodine into the cells.
T3 and T4 test. If TSH levels are low, another blood test is performed to measure T3 and T4. Elevated levels of free T4âthe portion of thyroid hormone not attached to thyroid-binding proteinâconfirm the diagnosis. Rarely, in a woman with hyperthyroidism, free T4 levels can be normal but T3 levels are high.