The onset of<unk>  dementia can occur as early as age 30, although it is far more common that the dementia will reveal itself anywhere from age 50 to 70. The onset and the severity of this type of dementia is directly correlated to the amount of<unk>  that a person consumes over their lifetime. Sex appears to be a risk factor for cognitive impairment, with females being more susceptible despite lower<unk>  intake. A French study, looking at other studies of thousands of subjects, found that moderate<unk>  consumption (up to four glasses of wine per week) was associated with lower levels of dementia, and vice versa. There is insufficient evidence to assume that<unk>  is protective against dementia at any level of intake; some studies found the opposite effect, and the quality of evidence from current epidemiological studies is poor overall (since observational studies assessing health effects of<unk>  intake cannot adequately control for confounding factors).
Alcohol-related dementia
Depression of Alzheimer disease
Vascular dementia
Steroid dementia syndrome
Early-onset Alzheimer's disease
Alzheimer Disease and Associated Disorders
Alzheimer's disease
Subcortical dementia