This is the 99th instalment in a series on dementia, including the research into its causes and treatment, advice for carers and stories of hope. Will using hormone replacement therapy (HRT) preserve a woman’s brain health and protect her from dementia or not? The debate continues. Various studies have looked at the effects of menopause and hormone treatment on the brain – and dementia risk. Some have suggested that HRT has no impact on brain health in older women, and that it has a neutral...