A new study published in the International Journal of Women’s Health uncovered strong evidence that hypothyroidism may play a protective role against certain female-specific cancers, including endometrial and breast cancer.

The investigation was prompted by longstanding observational studies that suggested a connection between thyroid abnormalities and cancers of the female reproductive system (endometrial, breast, ovarian, and cervical cancers). However, these earlier studies could not determine whether thyroid dysfunction caused these cancers or was merely associated with them.

To address this uncertainty, this research drew on large-scale genome-wide association study (GWAS) data. This powerful statistical approach used genetic variants as instrumental variables, enabling scientists

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