Tsh thyroid stimulating hormone is 2.380 is that normal? I know it is suppost to be between 0.30 4.70 acceptable range but don't understand it still
Thyroid test. Tsh is a hormone released by the pitutary gland and is negatively cycled in response to thyroid hormone levels, high levels of thyroid cause a drop in TSH and vica versa. The range of TSH is affected by physiological factors such as sleep, circadian variation, food intake and sleep but within the narrow range you quote there is also variations due to measurement called interassay variation.