Thyroid (underactive)
Three questions people ask, put to Google AI Overviews, Google AI Mode and ChatGPT in November 2026.
Led with the right place
Led with the right place
Led with the right place
Led with the right place
Led with the right placeNovember 2026
AI Overviews
0 of 1
AI Mode
0 of 1
ChatGPT
0 of 1
ChatGPTHistory starts when there is a second month to compare. November 2026 is the first.
Got the NHS facts right
Got the NHS facts right
Got the NHS facts right
Got the NHS facts right
Got the NHS facts rightNovember 2026
AI Overviews
2 of 2
AI Mode
2 of 2
ChatGPT
2 of 2
History starts when there is a second month to compare. November 2026 is the first.
Cited NHS or accredited sources
Cited NHS or accredited sources
Cited NHS or accredited sources
Cited NHS or accredited sources
Cited NHS or accredited sourcesNovember 2026
AI Overviews
2 of 3
AI Mode
2 of 3
ChatGPT
2 of 2
History starts when there is a second month to compare. November 2026 is the first.
The questions
Question
The NHS says
AI Overviews
AI Mode
ChatGPT
always tired, gaining weight and feeling cold all the time, could it be an underactive thyroid?
See a GP
●Not up front on AI Overviews
Google AI Overviews
Right place, not up front
The NHS says see a GP
The NHS says see a GP
●Not up front on AI Mode
Google AI Mode
Right place, not up front
The NHS says see a GP
The NHS says see a GP
●Not up front on ChatGPT
ChatGPT (logged out)
Right place, not up front
The NHS says see a GP
The NHS says see a GP
which blood tests diagnose an underactive thyroid
TSH and T4
Google AI Overviews
Matches the NHS
The NHS says TSH and thyroxine levels
The NHS says TSH and thyroxine levels
Google AI Mode
Matches the NHS
The NHS says TSH and thyroxine levels
The NHS says TSH and thyroxine levels
ChatGPT (logged out)
Matches the NHS
The NHS says TSH and thyroxine levels
The NHS says TSH and thyroxine levels
I missed my levothyroxine dose and it's nearly time for the next one. Should I take two together?
Never take 2 doses
Google AI Overviews
Matches the NHS
The NHS says never take 2 doses together
The NHS says never take 2 doses together
Google AI Mode
Matches the NHS
The NHS says never take 2 doses together
The NHS says never take 2 doses together
ChatGPT (logged out)
Matches the NHS
The NHS says never take 2 doses together
The NHS says never take 2 doses together
Matches the NHS
Not up front
Where the answers came from
NHS website6
JAMA Network2 Mayo Clinic2 Health Service Executive2
Blue Horizon Blood Tests1
National Institute for Health and Care Excellence (NICE)1 
Where the answers came from
NHS website2
JAMA Network2 Blue Horizon Blood Tests1
National Institute of Diabetes and Digestive and Kidney Diseases1
Pillzy1
Apollo 2471
