Thyroid hormones, T3 (triiodothyronine) and T4 (thyroxine), are produced by the thyroid gland and play a pivotal role in regulating metabolism, energy, and overall cellular function. T4 is primarily a storage form that the body converts into the active T3 as needed. Together, they influence how quickly your cells use energy, burn calories, and support vital processes like heart rate, digestion, and body temperature. Optimized thyroid levels = improved energy, easier weight management, and effici