factors above, it can be affected by other factors, like
thyroid meds.
For example, T3 meds (Cytomel) can suppress TSH to close to zero.
Here's how it works: Your hypothalamus, which is located near your brain, is the organ responsible for stasis (keeping things constant in the body), so it regulates things like body temperature and thyroid hormone levels. Your hypothalamus checks your thyroid levels and sends a message to your pituitary if they're too low.