Hormone therapy was once linked to dementia. A huge study found it might lower risk — if you start early enough.

New research suggests that hormone replacement therapy (HRT) may protect women's brains if started early, contradicting old concerns about dementia risk. Experts agree that the 'window of opportunity' for HRT is typically in the late 40s or early 50s. Neuroscientist Roberta Brinton emphasized that early intervention promotes and sustains brain health. However, starting HRT too late may be harmful, according to a growing body of research.

Read More