Free T4 (Thyroxine)

Free T4, also known as Thyroxine, is a critical biomarker in assessing longevity. This thyroid hormone is responsible for regulating metabolism, energy levels, and overall physiological function. When interpreting Free T4 levels, it is important to consider the potential impact on an individual’s health and lifespan. Low levels of Free T4 may indicate hypothyroidism, which can lead to fatigue, weight gain, and an increased risk of cardiovascular disease, thus impacting longevity. On the other hand, high levels of Free T4 could be a sign of hyperthyroidism, which has been associated with an increased risk of atrial fibrillation and osteoporosis, both of which can impact lifespan. Therefore, monitoring Free T4 levels is essential for identifying thyroid disorders and addressing them promptly to support healthy aging. Individuals should work towards maintaining a balanced thyroid function by regularly tracking their Free T4 levels, potentially reducing the risk of age-related diseases and supporting a longer and healthier life.