What is the gut microbiome and how does it affect weight loss?

The body is full of millions, actually trillions, of bacteria, viruses, and fungi. Together they are called the microbiome.

Bacteria often get a bad rap because they cause diseases, but many are actually very important for different health aspects, including immune function, heart health, brain function, and weight control.

This article will explain what the gut microbiome is, its effects on health, and how important it is.

What is the gut microbiome?

Microscopic organisms you can't see with the naked eye are called microbes, which include bacteria, viruses, and fungi, mostly found inside the gut in the digestive system.

Most of these microbes live in the gut's pouch, the cecum, in the large intestine, and this is called the gut microbiome.

Even though there are many types of microbes, bacteria are the most studied group, so it's often called good gut bacteria. The number of bacterial cells in the body is estimated to be higher than human cells.

There are over 1000 types of bacteria in the human gut microbiome, most of which play key roles in body health, but some can cause diseases.

These microbes can weigh 1-2 kilograms of body weight, almost the same as the brain, so they can be seen as another organ working for the body.

Effects of the gut microbiome on health

Humans evolved over millions of years living with microbes, and microbes learned to play very important roles in the body. Without the gut microbiome, survival is very difficult.

The gut microbiome starts affecting the body from the first moments of birth when a person encounters microbes passing through the birth canal. Research also suggests the fetus can be influenced by microbes inside the womb.

During growth, the gut microbiome begins to include many different types of microbes. High microbiome diversity is good for health, and diet can affect this diversity.

As the microbiome grows, it starts to affect the body in several ways, including:-

1. Digesting breast milkSome bacteria that start growing in baby’s gut called Bifidobacteria digest healthy sugars in breast milk, which are essential for the child’s growth.

2. Digestive fibers:Some bacteria digest fibers and make short-chain fatty acids, which are important for gut health. Fibers can also help with weight gain and reduce risk of diabetes, heart disease, and cancer.

3. Immune system control:The gut microbiome controls how the immune system works by communicating with immune cells. It can regulate how the body responds to infections.

4. Brain health controlSome studies suggest the gut microbiome can affect the central nervous system that controls brain functions.

Gut microbiome effects on weight

There are many different types of bacteria in the gut, most of which can provide important health benefits, but many unhealthy microbes can cause diseases.

The balance between healthy and unhealthy microbes in the gut is called Gut dysbiosis or gut microbiome imbalance, which may cause weight gain or obesity.

Research showed that the gut microbiome varies from person to person, even differing between twins, where studies found that when one twin suffers from weight gain or obesity, and the other does not, this is due to each twin's gut having a different microbiome.

Studies continued, showing that when the gut microbiome from the twin withweight gain is transferred to mice, they also gain weight compared to mice that received the microbiome from the twin without it.

Luckily, it was found that probiotics are helpful for a healthy gut microbiome and can help with weight loss.

The effect of the gut microbiome on the digestive system

The gut can affect digestive health and might play important roles in digestive diseases, like Irritable Bowel Syndrome IBS andInflammatory Bowel Disease IBD.

An imbalance in the gut microbiome can cause some annoying digestive symptoms like bloating, cramps, and stomach pain, which people with irritable bowel syndrome often experience.

However, a healthy microbiome can improve digestive health. Taking some probiotics with Bifidobacteria and Lactobacilli may reduce irritable bowel syndrome symptoms.

The effect of the gut microbiome on heart health

Surprisingly, the gut microbiome might affect heart health. Some studies found that the gut microbiome plays an important role in boosting cholesterol levels good HDL andtriglycerides.

Also, some unhealthy gut microbiomes might cause heart disease by making trimethylamine N-oxide TMAO, which can block arteries and lead to heart attacks and strokes.

But there are other good bacteria in the gut microbiome, especially Lactobacilli, that help lower cholesterol when taken as probiotics.

The gut microbiome’s effect on brain health

The gut microbiome can help brain health in many ways. Some types of bacteria can produce chemicals in the brain called neurotransmitters, like serotonin, which is an anti-depressant, and it's mostly made in the gut.

Also, the stomach is physically connected to the brain through millions of nerves. So the gut microbiome might affect how messages are sent to the brain through these nerves.

Many studies have shown that people with different mental disorders have different types of bacteria in their gut compared to healthy people.

Also, other studies showed that some types of probiotics can help improve symptoms depression and other mental health disorders.

The effect of gut microbiome on blood sugar

The gut microbiome may help control blood sugar levels, and reduce the risk ofdiabetes..

A study found that babies with a high genetic risk for type 1 diabetes showed a sudden drop in microbiome diversity before diabetes symptoms showed up.

Another study found that when the exact same foods are eaten by a group, their blood sugar levels can still differ, maybe because of the types of bacteria in their gut.

How to improve your gut microbiome

There are many ways to improve your gut microbiome, including:

1. Eat a variety of foods.

2. Eat fermented foods like yogurt.

3. Cut down on artificial sweeteners.

4. Eat foods that contain probiotics, like Bananas.

5.  Breastfeeding For at least 6 months.

6. Eat whole grains.

7. Buy Plant-based diets.

8. Eat foods rich in polyphenols, like Green teaR.

9. Take probiotic supplements.

10. Take antibiotics only when necessary.

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