Most people think of the gut as simply the body’s digestive system, but it plays a much bigger role than helping break down food. In fact, the gut influences immunity, metabolism, mood and even brain function, making it one of the body’s most important organs.

The gut, or gastrointestinal (GI) tract, is a long, connected system that begins at the mouth and ends at the anus. It includes the esophagus, stomach, small intestine, large intestine (colon), rectum and anus. Living inside this system are trillions of microorganisms collectively known as the gut microbiome, which help digest food, produce essential nutrients and protect the body from harmful bacteria.

Beyond digestion, the gut performs several vital functions. It breaks down food into nutrients that fuel the body, absorbs vitamins and minerals into the bloodstream, eliminates waste, and produces important vitamins such as vitamin K and certain B vitamins. The digestive system is also responsible for producing nearly 90 percent of the body’s serotonin, often called the “feel-good” neurotransmitter that helps regulate mood, sleep and appetite.

The gut also serves as one of the body’s first lines of defense. Around 70 to 80 percent of immune cells are found in the gut, where they help protect against harmful pathogens and infections. Scientists have likewise established the gut-brain axis, a communication network linking the digestive system and the brain, explaining why an unhealthy gut may affect mood, stress levels and mental well-being.

According to nutrition experts, common digestive complaints among Filipinos — including bloating, hyperacidity, gastroesophageal reflux disease, excessive gas and lactose intolerance — are often linked to diet and lifestyle habits. Highly processed foods, sugary drinks, irregular eating patterns and poor sleep may all disrupt the balance of good bacteria in the gut.

Building a healthier gut starts with simple daily habits. Eating fiber-rich local vegetables such as malunggay, ampalaya, kalabasa, sitaw, talong, okra and kangkong helps nourish beneficial gut bacteria. Traditional Filipino dishes like Pinakbet, Ginisang Munggo and Laing also provide valuable dietary fiber.

Experts also recommend incorporating fermented foods into daily meals. Atchara, Burong Isda, Burong Mangga and Burong Mustasa naturally contain probiotics that help maintain a healthy balance of gut bacteria. Unsweetened yogurt and cultured milk drinks are likewise good sources of beneficial microorganisms.

Other lifestyle changes can make a significant difference, too. Reducing sugary beverages, spacing meals three to four hours apart, staying hydrated, getting seven to nine hours of sleep, exercising regularly and managing stress all contribute to better digestive health. Limiting processed foods, alcohol and unnecessary antibiotic use can also help preserve the gut’s natural microbiome.

Caring for the gut goes beyond preventing stomach discomfort. A healthy gut supports stronger immunity, better nutrient absorption, improved metabolism and a healthier connection between the body and the brain further proving that good health truly begins from within.