Bacteria and the Gut: Can They Affect The Brain?

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Bacteria and the Gut Can They Affect The Brain?
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Many people may consider bacteria a bad thing.
However, you may be surprised to know that we
contain 10 times more bacterial cells than human
cells within the average human body.
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The term human microbiome refers to all the
microorganisms (and their genes) living within
the human body.
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Animated or Static?
The researchers of this project have reported
that these bacterial genes might contribute more
to human survival than our own genes.
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BEHAVIOR

• Ever had a gut feeling or an emotion you felt
  in your gut? Our brain is connected to the gut
  by whats called the enteric nervous system.

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• Its been shown that gut inflammation can induce
  anxiety-like behavior, and change the
  biochemistry of the central nervous system.

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• Similarly, its known that patients with IBS have
  significantly higher levels of both anxiety and
  depression

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• This gut-brain communication is bidirectional,
  with change in behavior overlapping change in the
  microbiome (gut bacteria) Its estimated that 90
  of serotonin is made in the gut.

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• This could partly explain why certain probiotic
  supplements have shown to improve mood and
  behavior in both humans and animals.

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In fact, researchers have found that certain
types of bacteria could decrease anxiety in mice
more than drug as commonly used for general
anxiety disorder, such as Lexapro. In another
study, human volunteers given a formulation that
could reduced depression and anxiety
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• In fact, a study in JAMA Psychiatry found brain
  inflammation was 30 higher in clinically
  depressed individuals than controls.

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What Foods Improve Gut Health and Our Microbiome?

• Whats good for us is also good for our
  microbiome vegetables, nuts, seeds, fruits and
  legumes.

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• Its estimated that our hunter-gatherer ancestors
  consumed on average 86 grams of fiber per day
• Foods abundant in fiber/complex carbohydrates can
  increase the growth of beneficial bacteria

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Whats empowering is that eating fiber-rich foods
can actually decrease the amount of bad bacteria
within us
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Conversely, diets high in refined carbohydrates
(flour, sugar, syrups, etc.) are found to
increase the growth of pathogenic bacteria, such
as Clostridium difficile and Clostridium
perfringens
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P-cresol is a human carcinogen (cancer-causing
agent), which can also affect the central nervous
system, cardiovascular system, lungs, kidney and
liver
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• Not only because of the impact food has on gut
  bacteria, but because there are many reports of
  diet affecting various psychiatric disorders,
  including schizophrenia, bipolar depression, ADHD
  and autism.

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