Have you ever wondered how different foods in your diet affect your brain? The brain is an extraordinary organ in charge of an astounding number of functions in your body. This is why the brain requires high-quality nutrients found in the food you eat. But what happens to your brain when you eat processed foods high in fat and sugar? To answer this question, we fed rats a diet high in fat and sugar and then studied its effects in a part of the brain important for memory and learning, known as the hippocampus. Surprisingly, we found out that eating foods high in fat and sugar, even for short periods of time, produces several harmful changes in the hippocampus. We think that these changes could have a negative impact on memory and learning.