Thyroid-stimulating hormone (TSH) 0.3 to 3
Total T4 (total thyroxine) 4.5 to 12.5
Free T4 (free thyroxine) 0.7 to 2.0
Total T3 (total triiodothyronine) 80 to 220
Free T3 (free triiodothyronine) 2.3 to 4.2
Should the test shows a patient being below the minimum numbers, he/she may be suffering from hypothyroidism, or low thyroid. If the scores are above the normal range, the patient may have an overly active thyroid, or hyperthyroidism. In either case, his/her doctor can advise him/her on appropriate medication.
Normal range: 30 to 74 ng/mL
Our bodies can produce vitamin D, but only with our bare skin, free of sunblock and lotions, being exposed to sunlight. And even then, people of color and older individuals may not be able to produce sufficient quantities for optimal health. The best way for determining if we need vitamin D supplements is to have a vitamin D test, known as 25-hydroxyvitamin D.