Huge Study Links Hormone Therapy to Lower Dementia Risk in Older Women

The biggest study yet on hormone therapy (HRT — medication that replaces hormones lost after menopause) tracked 183,450 UK women for 13 years. Those who used HRT for at least one year showed 10% lower dementia risk and 16% lower Alzheimer's risk. Published 26 August 2026, the study cannot prove HRT caused the benefit; users were more educated, a key caveat.