The Claim
In community-dwelling adults aged 42–99 years, thyroid stimulating hormone (TSH) levels show no statistically significant association with cognitive function as measured by the Buschke-Fuld Selective Reminding Test, Modified Mini-Mental State Examination, Trail Making Test Part B, and category fluency, regardless of age subgroup or medication use.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
Among adults aged 42 to 99, the level of thyroid stimulating hormone in the blood is not linked to performance on tests of memory, attention, and mental processing speed, whether considering age group or medication use.
See the scientific wording
In community-dwelling adults aged 42–99 years, thyroid stimulating hormone (TSH) levels show no statistically significant association with cognitive function as measured by the Buschke-Fuld Selective Reminding Test, Modified Mini-Mental State Examination, Trail Making Test Part B, and category fluency, regardless of age subgroup or medication use, suggesting TSH alone is not a reliable indicator of cognitive performance in this population.
The amount of TSH in the blood does not change how brain cells communicate during memory tasks, attention, or planning, so it cannot predict how well someone thinks or remembers.
What the research says
1 studyStudy: The Association of Thyroid Stimulating Hormone Levels with Cognitive Function and Depressed Mood
This study checked if the level of a thyroid hormone in the blood could predict how well older adults do on memory and thinking tests — and found no link. Even when accounting for age or thyroid meds, the hormone didn’t help predict brain performance.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.