How thyroid problems affect bones in women
Bone turnover in overt and subclinical hyperthyroidism due to autonomous thyroid adenoma.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Women with subclinical hyperthyroidism had normal bone metabolism despite universally suppressed TSH.
It’s commonly assumed that any form of hyperthyroidism—even subclinical—may harm bones. This study shows that normal thyroid hormone levels protect bone, even with very low TSH.
Practical Takeaways
If you have low TSH but normal free T3/T4, your bone health is likely not at immediate risk.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Women with subclinical hyperthyroidism had normal bone metabolism despite universally suppressed TSH.
It’s commonly assumed that any form of hyperthyroidism—even subclinical—may harm bones. This study shows that normal thyroid hormone levels protect bone, even with very low TSH.
Practical Takeaways
If you have low TSH but normal free T3/T4, your bone health is likely not at immediate risk.
Publication
Journal
Hormone research
Year
1992
Authors
E. de Menis, Giorgio Da Rin, I. Roiter, P. Legovini, G. Foscolo, Nicolau Conte
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Claims (4)
All premenopausal women with a certain type of thyroid tumor have very low levels of a key hormone (TSH), no matter how severe their thyroid symptoms are — but that low hormone level alone doesn’t tell us if their bones are being affected.
In women with a certain type of overactive thyroid before menopause, having full-blown overactivity (not just mild) seems to speed up how fast their bones break down and rebuild — more than in healthy women or those with only mild overactivity.
Women with a certain thyroid condition that lowers one hormone (TSH) but keeps others normal don’t show any real changes in how their bones break down or rebuild compared to healthy women — so their bone health seems fine as long as thyroid hormone levels stay in the normal range.
When someone has an overactive thyroid, their high alkaline phosphatase levels are usually because of faster bone turnover, not liver problems — thyroid hormones speed up how bones break down and rebuild.