A T4 test checks thyroid function by measuring thyroxine levels. Symptoms of high T4 include a fast heart rate and weight loss. You don't need to fast before you get a T4 test. A T4 (thyroxine) test ...

High-dose biotin can interfere with thyroid lab tests, leading to misleading results even when your thyroid is healthy, says Luke Coutinho.

Dear Dr. Roach: I have low thyroid levels. My blood tests say that the levels are OK, but I still have all the symptoms. I received biological hormones, which helped a lot, but yams bind to the ...

Researchers have known for decades that different brands of lab machines produce different results. The fix is easy — but not ...

Racing heart, fevered brow, and worried mind? Your condition could be more serious than anxiety, and it could be time to get your thyroid checked. The thyroid gland, a butterfly-shaped organ in the ...

For women, is there any connection between hypothyroidism and infertility? Read on to know how such hormonal imbalances can ...