For how we live.
An overactive thyroid speeds the body up; an underactive one slows it down. But no single symptom is reliable — in one large screening study, individual thyroid symptoms were poor at flagging who actually had a problem.
Sea moss is sold as a 92-mineral cure-all, but no human trial shows it delivers those benefits — and because seaweed's iodine content is wildly variable, the documented risk falls on the thyroid.
A fine tremor everyone has — worsened by caffeine, stress, tiredness or some drugs — is the usual cause. Essential tremor is the commonest tremor disorder; a shake at rest is the one that points elsewhere.