Menopause May Mark a Critical Window for Understanding Alzheimer's Risk in Women

A study in Nature Medicine reveals that menopause may mark a critical window for assessing Alzheimer's risk in women. Women are twice as likely to develop Alzheimer's than men, and while living longer is a factor, there might be biological reasons too. Previous research, including a Lancet study, linked early menopause to higher dementia risk.

This new study, published in Nature Medicine, suggests menopause could be a "critical window" for brain aging. In older women with higher levels of certain molecules linked to brain aging, Alzheimer's risk increases. The findings could lead to early-warning tests for early intervention therapies. The average age of menopause for women in the U.S. is 52, a period of significant hormonal flux that lasts two to eight years.

In the study, researchers tracked hormone levels in 80 healthy women at various stages of menopause and found that six of these molecules changed during this transition. These changes were more closely tied to hormone levels than biological age. Those experiencing night sweats during menopause showed a greater increase in inflammatory molecules.

The study also found that women with higher levels of these molecules were 15% more likely to develop Alzheimer's and had worse memory. Co-senior author Kaitlin Casaletto from UCSF Fein Memory and Aging Center emphasized that menopause may be a powerful time to intervene and set up the brain for resilience or vulnerability to dementia in later life.