The gut is colonized by trillions of microorganisms that influence endocrine, immunological and psychological processes. Different studies have demonstrated that some probiotics are involved in the increase of the synthesis of certain neurotransmitters, such as serotonin, and, therefore, help our mood.
In all likelihood, you have noticed at some point that your heart races,
you sweat, and your mouth dries up before an exam or a job interview. It is anxiety,
the normal response of our body to a threatening situation. This reaction is no
longer normal and becomes a disorder when the intensity and frequency of this
type of response are exaggerated, when there are increasingly more stimuli that
trigger it, or when it cannot be controlled.
Did you know that our gut and brain are closely connected and that the state
of your gut microbiota may be behind certain mood disorders, such as anxiety?
This bidirectional connection is named the “gut-brain axis” and it means
that what happens inside the gut affects the brain and vice versa. For example,
if our gut microbiota becomes unbalanced for any reason, then the levels of certain
molecules produced in the digestive tract —such as serotonin, cytokines, etc.— will
be altered and, via the bloodstream, they will reach the brain, altering its
Multiple investigations have proven that the gut microbiota, through this “axis”,
is behind not only digestive disorders but also mental disorders, such as
anxiety or other mood disorders.
For this reason, research has recently focused on psychobiotics and
probiotics that may help treat disorders such as depression, anxiety or stress.
Thus, some studies carried out with the associations of two strains, Lactobacillus
helveticus Rossel®-52 and Bifidobacterium longum Rossel®-175, have shown a reduction in the gastrogut symptoms
related to stress; reduction of psychological stress in healthy individuals and
the improvement of mood, anxiety and sleep in patients with mild-moderate depression.
There is also evidence that certain species of probiotics participate in
the increased synthesis of certain neurotransmitters, such as serotonin.