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The medicine cabinet: Ask the Harvard experts: Help interpret my recent thyroid tests

Q: I had a thyroidectomy a few years ago, and have been taking levothyroxine daily since then. My dose has been stable. While ...
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Normal, low, and high TSH levels explained

Low TSH levels may suggest hyperthyroidism, which causes symptoms like weight loss and increased appetite. High TSH levels can be a sign of hypothyroidism, with symptoms like weight gain and fatigue.