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
Some scientists have found that people who are distracted at lunch have a vague memory of lunch, which causes them to feel more hungry and eat more at dinner. This concludes that memory deficits can cause weight gain.
 Cheek's research results show that obesity may cause brain atrophy and memory decline