The Claim
Exogenous administration of synthetic thyroid hormone increases serum thyroid hormone concentrations and worsens pre-existing hyperthyroidism.
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.
Giving synthetic thyroid hormone externally raises levels of thyroid hormone in the blood and makes an existing overactive thyroid condition more severe.
See the scientific wording
Exogenous administration of synthetic thyroid hormone elevates serum thyroid hormone concentrations and exacerbates pre-existing hyperthyroidism.
What the research says
2 studiesStudy: Association between Over- and Under-Replacement with Thyroid Hormone and Incident Heart Failure
Giving people extra thyroid hormone pills can push their thyroid levels too high, making them hyperthyroid — this study shows that happens and increases heart risks.
This study found that when people take extra thyroid hormone pills, their blood levels of thyroid hormone go up — and their bodies can't handle it well, making hyperthyroidism worse. It's like pouring too much water into a cup that's already full.
Related videos
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 2 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.