Diet Pattern Analysis in Alzheimer's Disease Implicates Gender Differences in Folate-B12-Homocysteine Axis on...

Area of Science:

• Neuroscience
• Nutritional Science
• Gerontology

Background:

• Cognitive impairment in Alzheimer's disease (AD) is linked to low vitamin B12 and folate, and high homocysteine.
• Understanding the interplay between diet, these blood markers, and cognition is crucial for AD management.

Purpose of the Study:

• To investigate the associations between dietary patterns, blood folate-B12-homocysteine levels, and cognitive function in AD patients.
• To explore potential gender-specific differences in these relationships.

Main Methods:

• Cross-sectional study of 592 AD patients (246 males, 346 females).
• Data collected included demographics, blood profiles, Mini-Mental State Examination (MMSE) for cognition, and a Food Frequency Questionnaire (FFQ).
• Structural Equation Modeling (SEM) and gender-stratified regression analyses were used.

Main Results:

• Higher MMSE scores correlated with higher intake of coffee/tea, education, BMI, and younger age.
• Dietary factors (skimmed milk, pork, coffee/tea) and blood profiles (homocysteine, B12, folate) directly influenced cognitive outcomes.
• Diet's effect on cognition was not mediated by folate-B12-homocysteine levels.
• Vitamin B12 directly impacted male cognition, while homocysteine was more critical for female cognition.

Conclusions:

• Both dietary patterns and blood profiles are significantly associated with cognitive function in AD.
• Gender differences exist in the impact of diet and nutrient levels (B12, homocysteine) on cognition.
• Further multi-center, longitudinal studies are needed to validate these findings and improve nutritional care for dementia patients.