Not affording food: linked to lower brain scores. Especially when new.

Cross-sectional study. 512 people. food insecurity measured twice, ~3.2 years apart (2018-2021 visit and 2022-2024 cognition visit); cognition measured once.

One snapshot in time. Nobody was told what to do. A clue, not proof.

Who: Midlife, predominantly Mexican-American, low-income women in the Salinas Valley, California (mean age 48.8; 89% born outside the US; 44% had 6th-grade education or less). Cross-sectional n = 496-512; longitudinal n = 426-438

• Short on food now≈4 yrslike being older
• Newly short on food≈7 yrslike being older
• Short on food, ongoingno clearafter adjusting

More to know, from our read of the paper:

• Observational: cognition measured only once, so reverse causation (lower cognition making it harder to stay food secure) cannot be ruled out (authors' limitation)
• Food insecurity is self-reported (USDA 6-item module); possible under-reporting due to stigma or recall bias
• Cross-sectional memory (CI -0.29 to 0.03) and executive function (CI -0.19 to 0.01) results crossed the null; only global cognition was clearly lower for current FI. New FI: executive, memory and global clearly lower; verbal fluency CI crossed the null
• 'Roughly 4 / 7 years of age' is the authors' own translation using 0.026 SD per year of age in this sample (Discussion), not a measured brain age
• COVID-19 pandemic happened between the two FI visits and may have driven new FI and other stressors

Researchers studied 512 midlife women in California's Salinas Valley, mostly Mexican-American and low-income, average age 49. Women who couldn't reliably afford enough food scored lower on thinking tests, about what you'd expect from being 4 years older. Women who had newly become food insecure over about three years scored lower still, roughly like being 7 years older, while those food insecure at both visits showed no clear link after adjusting for income and schooling. Thinking was tested only once, so this is linked, not proven.

We read the abstract and the full text of this paper and checked every number on this page against it (16 facts, checked on 2026-10-29). The study design is named above. Cohort and other observational studies are described as linked, not proven. Found an error? Email theis@onestudyaday.com.