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Gut Microbiome: The Secret to a Balanced Gut Microbiome and the Foundation of Good Health

July 09 / 2026

 

          Did you know that our bodies are home to trillions of microscopic organisms, especially within the digestive system? These microorganisms collectively form what is known as the “Gut Microbiome” (the community of microorganisms living in the gut), with a combined weight of approximately 1–2 kilograms.

          In medical terms, the gut microbiome is often described as a “hidden organ” because it does far more than assist digestion. It plays a crucial role in supporting the immune system and influencing overall health in ways we may not always realize.

 

Why Are Gut Microorganisms Important?

          Our intestines contain a large ecosystem made up of both “beneficial bacteria” (which support health) and “harmful bacteria” (which may contribute to disease when present in excessive amounts). When beneficial bacteria are diverse and maintain a healthy balance, they help support the body in several important ways:

  • Supporting Digestion and Nutrient Absorption Gut bacteria help break down dietary fiber that the body cannot digest on its own and produce essential vitamins, including vitamin K and B vitamins.
  • Strengthening the Immune System More than 70% of immune cells are located in the gut. Beneficial microorganisms help regulate immune responses and support the proper function of immune cells.
  • The Gut-Brain Axis The gut and brain communicate through a connection known as the gut-brain axis. Gut microorganisms can produce neurotransmitters, such as serotonin, which may play a role in regulating mood, stress, and sleep.

 

Warning Signs of an Imbalanced Gut Microbiome (Dysbiosis)

          When lifestyle factors reduce beneficial bacteria and allow harmful bacteria to increase, the body may show signs of imbalance, including:

  • Frequent bloating, abdominal discomfort, or excessive gas

  • Changes in bowel habits, such as chronic constipation or frequent diarrhea without a clear cause

  • Easy fatigue and poor sleep quality

  • Skin problems, such as unexplained rashes or inflammatory acne

  • Getting sick easily or experiencing frequent colds

 

Restoring Gut Balance with “Probiotics” and “Prebiotics”

          Maintaining a healthy gut microbiome can begin with choosing nutritious foods. Two key types of nutrients that support gut health include:

Nutrient Type

Main Function in the Gut

Common Food Sources

Probiotics

Live beneficial microorganisms that help increase the population of good bacteria in the gut.

Yogurt, low-sugar fermented milk, kimchi, miso, kombucha

Prebiotics

Dietary fibers that act as “food” for beneficial bacteria and support their growth.

Bananas, onions, garlic, asparagus, whole grains, legumes

 

Important note : When consuming fermented foods to increase probiotic intake, choose products from clean and reliable sources. Also be mindful of sodium and sugar content, which may be higher than recommended.

 

Long-Term Gut Health Care

          In addition to choosing healthy foods, lifestyle habits also play an important role in maintaining gut balance. These include:

  • Getting enough quality sleep

  • Managing stress effectively

  • Avoiding unnecessary use of antibiotics without medical advice

          Antibiotics can affect both harmful and beneficial bacteria in the gut. Unnecessary use may disrupt the balance of the digestive system.

          For individuals experiencing persistent bowel irregularities or chronic digestive symptoms, consulting a gastroenterology specialist for a thorough evaluation can help develop an appropriate plan for lifestyle adjustments and treatment based on individual health needs.

 

Listen to Your Gut and Take Care of Your Digestive Health With care and support from : Gastroenterology and Hepatology Department Thonburi ThawiWatthana Hospital (THT)