Cars need fuel to operate. Some cars do fine no matter what type of gas you put in the tank. But expensive cars typically only do well when you fill the tank with premium gas.
Your brain is like an expensive car. You can try and feed it what YOU want and what YOU think is delicious, but it probably won’t operate optimally. In fact, your brain can actually become damaged if you feed it the wrong foods. For example, many processed and refined foods are harmful to your brain, causing inflammation and toxic overload. Diets high in refined carbohydrates not only promote inflammation but also oxidative stress and worsen your body’s regulation of insulin.
All of this damage affects how your brain operates. That means when you eat a poor diet, you increase the risk of developing a mood disorder such as depression and anxiety, a cognitive impairment (making it hard to think clearly or remember information), and sleep issues.
And then it becomes a vicious cycle, because once our sleep takes a hit and our mood takes a hit and we can’t focus well, we intuitively want to reach for comfort foods that are usually unhealthy, and the cycle starts all over.