Gut microbiota shape mental health, and researchers are now testing them as treatment. Studies in germ-free mice show how different gut bacteria affect anxiety, depression and other conditions. The science is moving from understanding the link toward using gut bacteria to manage mental health problems.
Summary: Researchers know that changes in gut microbiota (the bacteria in your gut) harm mental health. These changes are a major reason common mental health problems are rising. Using germ-free mice, researchers can now see what different gut bacteria do to mental health. They can also start using gut bacteria to treat mental health problems. So the science can now move from understanding to real-world use.
Many kinds of mental illness are rising. These include anxiety, depression, amyotrophic lateral sclerosis (ALS), and many neurodegenerative diseases (diseases where brain cells break down). Science has struggled to explain why these disorders have risen so fast in the last few decades. It now seems most adults live with one common mental health problem or another.
It is easy to guess that a fast-changing world plays a big part. These diseases were rare just a century back. So fast-changing surroundings and lifestyles must be setting people up for mental health problems.
But the bigger questions remain. What changes in our world and lifestyle are driving the rise in mental health problems? What role does each one play? And how do they do the damage?
This is not easy to sort out. Tens of factors play a part in the rise of mental health problems. One of them is dysbiosis, or severe changes in the gut bacteria.
Studies show that changes in gut bacteria may affect both body and mind. But it is hard to tell which changes cause these disorders. Trillions of microbes live in the gut. Health problems can come from small shifts in their numbers. So tracking these small shifts is very hard. Still, researchers have been making progress.
To learn how gut bacteria affect mind and body, researchers use so-called germ-free mice. These mice have no gut bacteria at all. Researchers then add gut bacteria to these mice. That lets them see what different kinds of bacteria do to mental and physical health. This shows which changes in gut bacteria cause harm, and it points to ways to bring the gut back to normal.
Researchers now know that gut bacteria make many compounds that affect health. These include neurotransmitters (brain chemical messengers), short-chain fatty acids, bile acids, vitamins, lactate, and many more. Researchers are now also learning why these compounds matter. They can raise or lower their levels by tweaking the gut bacteria.
Researchers think we may one day use gut bacteria to change how much of these compounds the body makes. That may help treat most mental health disorders. The list runs from depression and amyotrophic lateral sclerosis (ALS) to autism spectrum disorder (ASD).
This kind of therapy has many good points. First, it is a more natural way to treat mental health disorders. It may work slowly. But it can bring lasting relief without major side effects.
Keep in mind that there are hundreds of drugs for mental health disorders. Yet they work in only a small number of cases. These drugs also cause severe side effects.
Take depression. There are tens of drugs to treat it. Yet these drugs barely work in less than half of all cases. That means drugs almost fully fail in more than 50% of cases. Worse, they have many side effects. They work slowly. And people must take them for a long time, sometimes for life.
Unlike drugs, new therapies like gut bacteria may bring lasting relief. Once a healthy gut is restored, a person can start living without any medicine. So this approach is safe, and it also helps treat mental health problems.
So get expert help for common mental health problems. Telehealth addiction treatment from Addictionology Center helps you manage your mental health from the comfort of your home.
Frequently asked questions
Can a bad gut biome cause depression?
Changes in gut bacteria, called dysbiosis, are a major reason common mental health problems are rising. These include anxiety and depression. Trillions of microbes live in the gut. Even small shifts in their numbers can lead to health disorders. Germ-free mouse studies let researchers see which changes in gut bacteria cause harm and how to bring them back to normal.
How does the gut microbiome affect mental health?
Gut bacteria make neurotransmitters, short-chain fatty acids, bile acids, vitamins, lactate and many other compounds. These shape both physical and mental health. By tweaking the mix of gut bacteria, researchers can change the levels of these compounds. That is the basis for using the gut microbiome to treat mental health disorders.
Can gut bacteria treat depression instead of medication?
That is where the research is heading. Antidepressants help in less than half of cases. They cause side effects, work slowly, and are sometimes taken for life. A gut-based approach may also work slowly. But it can bring lasting relief without major side effects. And once a healthy gut is restored, a person can start living without medicine.
Why are mental health problems rising?
Anxiety, depression and neurodegenerative diseases were rare just a century ago. That points to fast-changing surroundings and lifestyles. Tens of factors are involved. One of them is dysbiosis, a severe change in the gut’s bacteria. Knowing which changes in gut bacteria cause harm is the first step toward fixing them.
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