Doctors reveal the worst foods for your brain

2. Fast food

Burger, french fries and a glass
Fast food meal | cookelma / iStock / Getty Images

This one is probably not a shock to anyone. Fast food is rich in saturated fats, which can prevent your body from fighting the plaque responsible for Alzheimer's disease. In addition, fast food is loaded with sodium, which causes an almost immediate decline in memory. If you've had trouble concentrating after eating a meal at your favorite fast food restaurant, you know what we're talking about. If you can not avoid eating fast food, go for a salad or a grilled chicken sandwich to save calories and reduce your sodium intake.

following: Water is nice to you.