According to a study published in the medical journal of the American Academy of Neurology, Neurology, older people who participated in the Supplemental Nutrition Assistance Program (SNAP) experienced a slower rate of memory loss in comparison to their counterparts who did not participate.

SNAP is a government program implemented by the US government to help low-income households achieve food security through financial benefits. The study involved 3,555 people with an average age of 66 who were eligible for SNAP benefits. Of those people, 559 were eligible SNAP users, and 2,996 were eligible but did not use the program.

Initially, at the beginning of the program, SNAP users had a lower socioeconomic status and a greater number of chronic conditions than those who did not participate in the program. After adjusting some of the risk factors statistically, the researchers found that while SNAP users had worse memory scores at the start of the study, they had slower rates of memory decline compared to non-users throughout the study. 

(Source: https://theprint.in/science/study-finds-new-ways-to-improve-memory-in-older-people/1208709/)