Scientist Cheek found that there is a clear link between body mass index (BMI, a method of measuring fat and thin by the ratio of height to weight) and memory loss  In the experiment, participants with higher BMI performed worse
A brain scan study involving 500 participants confirmed that obesity is closely related to brain degradation caused by aging, and this effect is particularly obvious in middle-aged people.
 Cheek's research results show that obesity may cause brain atrophy and memory decline