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
After surgically transplanting obese abdominal fat into the body of wasting mice, it was found that these fats caused brain inflammation in the wasting mice, changed the synaptic function, and caused cognitive impairment in the transplanted mice.
 Cheek's research results show that obesity may cause brain atrophy and memory decline