The gut microbiome consists of all microorganisms living in the digestive tract, including bacteria, fungi, viruses, yeasts, and other microscopic organisms. Most of the microbes in the gut reside in the large intestinal pouch called the cecum. Among the numerous living organisms, bacteria are the most abundant (more than 40 trillion).

Overall, the microbiota may weigh 1-2 kg, roughly equivalent to the weight of the brain. An individual is first exposed to microbes during passage through the birth canal, or when born. However, some suggest that babies come into contact with microbes while in the womb. As one grows older, the number and species of microbes begin to diversify.

Health Benefits

The presence of microbes in the digestive tract is crucial for health, with each playing a different role. In fact, without the gut microbiome, survival would be challenging. Some health benefits resulting from the abundance of microscopic organisms in the body include:

1. Digesting Breast Milk and Fiber

The first bacteria to grow in human life are Bifidobacteria. They help digest the sugars in breast milk, essential for the baby's growth. Additionally, certain bacteria aid in fiber digestion and produce short-chain fatty acids, both crucial for gut health.

2. Boosting the Immune System

Over time, the gut microbiome learns how to respond to substances entering the body, including food, medications, and environmental bacteria, by communicating with immune cells. When this occurs, the immune system attempts to eliminate anything deemed harmful or may overreact through allergic responses.

Gut microbiome may help boost the immune system

3. Potentially Controlling Blood Sugar Levels

The diversity of gut microbiota varies from person to person. The gut microbiome may help control blood sugar, even when people consume the same foods. Generally, in sick individuals, the number of unhealthy bacteria in their gut increases.

Ways to Increase Gut Microbiota

As mentioned earlier, as one grows, the diversity of microbes increases. Factors such as daily food or beverage consumption, stress, environmental exposure, and certain diseases influence this diversity, either increasing or decreasing gut microbiome numbers.

• Consume a variety of foods: grains, legumes, and fruits contain plenty of fiber, which helps the growth of healthy gut bacteria.
• Consume fermented foods with probiotic content: yogurt, kefir, and kimchi contain beneficial bacteria, which can help reduce the number of disease-causing bacteria in the gut.
• Consume prebiotic foods: bananas, apples, blueberries, garlic, onions, leeks, oats, and asparagus are prebiotic foods (fiber that stimulates the growth of healthy bacteria).
• Consume foods containing polyphenols: grains, vegetables, tea, and cocoa.
• Reduce consumption of certain food groups: artificial sweeteners (saccharin, sucralose, aspartame), processed meats, saturated fats (cheese, butter, goat, milk).
• Exclusive breastfeeding for 6 months: there are many beneficial bacteria in breast milk compared to formula milk.

Fermented foods contain good bacteria that benefit the gut

The gut microbiome comprises all microorganisms living in the digestive tract and can enhance health in specific aspects. Ways to increase its numbers include consuming a variety of foods (grains, legumes, fruits), as well as fermented, prebiotic, and polyphenol-containing foods.

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