I'm a bit confused. I thought a high T4 went with hyPOthyroid?

Is it overactive, or underactive?

Either can be treated; don't know anything about a diet plan, though.

I have underactive thryoid, it runs on both mum's and dad's side of the family, all of us have it. Pill a day for life. Tendency for weight gain, irritable, sleepy, other symptoms let us know when it is time to see the doc for bloodwork and an adjustment to the meds.

I have 2 friends with overactive thyroid. I know it means weight loss, and complications with eyes.

As someone already mentioned, not to be ignored, either way!