Once overt, replacement is lifelong
- The honest default
Once the gland is destroyed enough to make you overtly hypothyroid, it doesn't recover — so thyroid hormone replacement is typically lifelong, the way insulin is in type-1 diabetes. There's no approved treatment that reverses the autoimmunity or regrows the gland. Levothyroxine treats the consequence brilliantly, not the cause. That's the realistic baseline — and it's a good one: dosed right, people live entirely normally. Evidence ●●●●○