What Is Thyroid Cancer?
3. T3 and T4 Hormones
These two hormones are critical to almost every body system. T3, along with T4, is responsible for providing energy to the body during growth and activity. They impact the rate at which the heart beats and the way energy is extracted from proteins ingested. Body temperature is also reliant on T3 and T4 hormones.
When the thyroid is overstimulated and active, it makes too many hormones, flooding the bloodstream and causing the metabolism to speed up. This can cause rapid heartbeat and rapid weight loss. On the flip side, when the thyroid does not produce enough hormones, energy isn’t created, and several body systems can slow to a dangerously low level.
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