what is a low thyroid number
If your blood test shows low TSH levels, you may have a common condition called hyperthyroidism, which is when your thyroid gland produces too much T3 and T4. Low levels of T3 and/or T4, however, can indicate a condition called hypothyroidism.t secretes thyroid hormones T3 and T4. These hormones help regulate your metabolism. The pituitary gland, located at the base of your brain, produces thyroid-stimulating hormones (TSH) that tell your thyroid gland to produce T3 and T4.