Updated on May 18, 2023

Why The Gut Microbiome Is Crucial For Digestion


Updated on May 18, 2023

Why The Gut Microbiome Is Crucial For Digestion

If you’re sitting in your room feeling lonely – remember, you aren’t alone. There are trillions of microbes – both good and bad, residing in your body. Many species of these organisms have housed themselves in your gut, probably since you were born! Find this odd? Think of them as unwelcome guests? Here’s how they depend on your diet and how they impact digestion.

Gut Microbiome: A world of their own

Bacteria. Viruses. Fungi. Other things that might make you squeal. All of these come under microbes or microorganisms. It’s important to note that bacteria are the most well studied of them. You’ll be surprised to know that over a thousand species of bacteria are present in your body, and especially in your gut. They coexist peacefully, like happy, friendly neighbours.

Wondering where they’ve set up camp in your gut? It’s in this small pocket called caecum present in your colon. Altogether, these microbes may weigh as much as 2-5 pounds (1-2 kg), which is roughly the weight of your brain. Together, they function as an extra organ in your body and play a huge role in your health.

Companions from birth

Every individual possesses a distinct network of microbiota, which is determined by their DNA. The initial exposure to microbes occurs during birth, and further colonization takes place through breast milk. As a person grows and interacts with various environments or follows specific dietary patterns, their microbiota network continues to develop and evolve.

Feed your guests

We’ve talked about the residence of our esteemed inhabitants. But what sustains them? You probably guessed this one – the food we eat, especially high-fibre diets, is converted into Short-Chain Fatty Acids (whew!), which lowers the pH of the colon. This keeps away some of the bad bacteria from growing in our gut. In short, welcome the fibres into your diet.

What you eat affects them

Diet is one of the most important factors that shape the network of bacteria inside our colon. We’ve seen how this happens. Here are some interesting facts to understand:

What way diet affects your gut residents :

  • Alterations in diet can even bring about changes in your microbiome in one single day!
  • If these alterations are eliminated, your gut bacteria will return to normal within 48 hours.
  • High-fat or high-sugar diets can affect these bacteria and alter your body clock too.
  • In case of bodily stress, like a burn injury, the gut bacteria can take a hit within a day.

These facts highlight the significant influence of diet on the composition of our gut microbiome. This understanding holds immense value when considering dietary strategies to manipulate the gut microbiome, particularly in the context of disease. Certain foods that contain prebiotics, such as whole grains, beans, vegetables, fruits, garlic, bananas, onions, asparagus, and seaweed, can be beneficial in nurturing a healthy gut microbiome.

Digestion and other roles: The rent they pay

Some bacteria get to work very soon after birth. One of the first occupants of our gut microbiome, Bifidobacteria, helps in digesting the healthy sugars in breast milk which are important for growth. Some bacteria help in digesting fibres.

This may help prevent weight gain, diabetes, heart disease, and the risk of cancer. The gut microbiome can also influence our immunity by communicating with the immune cells. About 70% of the immunity stays in the gut in the form of these microorganisms!

Gut microbiome: Our second brain!

Have you ever had a gut feeling to do something? Or experienced butterflies in your stomach? These experiences clearly demonstrate the link between the gut and the brain. The microbes that live in our gut make certain chemicals that affect how your brain works.

Indeed, certain chemicals like butyrate, propionate, and acetate, collectively known as Short-chain Fatty Acids (SCFAs), play a role in the connection between the gut and brain. SCFAs have been found to influence brain function through various mechanisms, including appetite regulation. They can help reduce appetite and contribute to feelings of satiety, thus impacting overall food intake and energy balance.

Gut dysbiosis: When the good bacteria are under attack

The diligent bacteria in our gut work tirelessly to maintain proper digestion and support our immune system. However, there are instances when they can be overwhelmed by harmful bacteria, leading to an imbalance in the gut. This condition, characterized by an disrupted equilibrium of the natural bacterial colonies, is known as dysbiosis.

Gut dysbiosis can lead to:

  • Bad breath
  • Upset stomach
  • Nausea
  • Constipation
  • Diarrhoea
  • Bloating
  • Rash or redness
  • Fatigue
  • Having trouble thinking or concentrating
  • Anxiety

Some effects of dysbiosis, such as stomach upset, are temporary and mild. In many cases, your body can correct the imbalance without treatment. You may need some prebiotic or probiotic supplements to treat dysbiosis.

Thus, it is clear that we have a very intimate and strong connection with our gut microbiome. It is also vividly impacted by our diets. So watch what you eat to keep your gut residents happy!

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