Your gut does far more than digest food. Scientists now call it the “second brain” because it contains a vast network of neurons that communicate directly with your brain. This explains why your stomach reacts when you feel anxious or stressed.

The gut also produces most of the body’s serotonin, the hormone responsible for happiness and emotional balance. When your gut is unhealthy—due to poor diet, excessive sugar, or antibiotics—it can affect mood, energy levels, and even sleep quality.

Supporting gut health is surprisingly simple. Eating more fiber, fermented foods, and whole grains helps friendly bacteria thrive. Drinking enough water and reducing processed foods can also restore balance. When your gut feels better, your mind does too.