Mild cognitive impairment: a reduction in alcohol consumption observed after nutritional counseling

Two dietary counseling approaches compared

The analysis covers 189 participants who reported consuming alcohol at baseline, out of the 270 people in the trial. Their mean age was 70.6 years, and 52% were women. All had mild cognitive impairment.

Participants received group nutritional counseling focused either on a plant-based diet of minimally processed foods or on the recommendations of the German Nutrition Society. The trial also incorporated a computerized cognitive intervention in a factorial design. The abstract does not detail its influence on the results presented.

Consumption was expressed in standard drinks containing 10 grams of alcohol. Follow-up took place at 12 months, with imputed data for 15 participants.

An observed reduction, with neither approach showing superiority

Alcohol consumption decreased statistically significantly in both groups. The reported standardized effect sizes were 0.30 for the plant-based counseling and 0.39 for counseling based on the German recommendations. These values do not indicate the number of drinks avoided.

No statistically significant difference between the two approaches was detected. This does not demonstrate their equivalence, but it does not support favoring the plant-based diet to reduce alcohol consumption.

The abstract does not present a comparison with a group receiving no nutritional counseling. The observed reduction therefore cannot be attributed with certainty to dietary counseling alone.

Differences between women and men need confirmation

Among women, the abstract reports a significant reduction only in the group following the German recommendations. This finding is not sufficient to demonstrate that this approach suits them better: a difference in statistical significance between subgroups does not, by itself, establish a difference in effectiveness.

Among the 84 participants who reduced their consumption, higher baseline consumption, older age and better adherence to counseling were associated with a greater reduction. These associations, studied in a selected subgroup, do not prove that these factors cause the reduction.

What this study does not demonstrate

The finding concerns alcohol consumption, not dementia prevention or improved memory. It also does not allow the effect to be generalized to adults without mild cognitive impairment.

The value of this analysis lies in suggesting that broader dietary counseling could help reduce alcohol consumption. It provides neither an individual protocol nor a comparison with an intervention specifically focused on alcohol.

What we can take away

Two nutritional counseling approaches are associated with a reduction in alcohol consumption at 12 months in older adults with mild cognitive impairment. Neither shows superiority, and this analysis establishes no cognitive benefit.