Thyroid Health Blood Test
Your thyroid is essential to your health and wellbeing. From how fast your heart beats to how quickly your body burns calories, your thyroid directly influences things as subtle as your mood and as vital as your fertility.
This test measures both thyroid-stimulating hormone (TSH) and Free T4 (thyroxine) to assess thyroid function and can screen for specific thyroid conditions, such as underactive thyroid (hypothyroidism) and overactive thyroid (hyperthyroidism).
TSH and T4 levels work interdependently (and often inversely) rising or falling in response to one another. For example, low T4 levels often cause TSH levels to rise signaling hypothyroidism, while high T4 levels often cause TSH to drop signaling
Please note that if you're taking high-dose biotin supplements (vitamin B7,) commonly for skin and nail health, you should wait at least eight hours from the last dose before sample collection.