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Has anyone come back from dementia? Understanding reversible causes and permanent damage

According to the Alzheimer's Association, an estimated 6.9 million Americans aged 65 and older are living with Alzheimer's dementia in 2024 alone. The question of 'Has anyone come back from dementia?' is complex, rooted in the critical distinction between irreversible neurodegenerative disease and treatable, dementia-like symptoms caused by other factors.