Research
Mixed
Low-carbohydrate diets (LCDs) and calorie restriction can improve cognitive function and combat age-related cognitive decline through mechanisms involving reduced oxidative stress, anti-inflammatory responses, and enhanced neurogenesis.
Limit carbohydrates to less than 20% of your calories, focusing on fats and proteins from meat, poultry, fish, eggs, cheese, nuts, and seeds. This approach may help combat age-related cognitive decline, especially if you have obesity or type 2 diabetes. Monitor your lipid profile as high fat intake can raise LDL.
ModerateSupportsMEDIUM confidence
Research in rodent models has demonstrated that cutting caloric intake by 20–40% can extend lifespan and improve cognitive function, making LCDs one of the most effective nutritional approaches for enhancing cognition in rodents (61).
Why this rating
Strong rodent data, some human observational data, but fewer RCTs compared to MeDi.
Source
The intricate interplay between dietary habits and cognitive function: insights from the gut-brain axis
Ruyi Zhang et al. · Frontiers in Nutrition · 2025
DOI 10.3389/fnut.2025.1539355
narrative_reviewCited 21×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
- Adherence to the Mediterranean diet (MeDi) is associated with improved cognitive performance and a delay in cognitive decline in elderly populations, particularly when enriched with extra virgin olive oil or nuts.Good
- Plant-based diets, particularly those emphasizing nutritious plant foods, are associated with a reduced risk of cognitive impairment and dementia compared to non-vegetarian diets.Good
Related findings · Mixed
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