The medical literature tends to support this theory.
Now to control this inflammation one need not look any further than the gut.
Once the gut inflammation takes hold, cytokines circulate throughout the body, including into the brain.
The secret to reducing gastrointestinal inflammation is to identify food irritants, bacterial pathogens and improve optimal microbial flora.
Some studies have found that the probiotic, Lactobacillus (L.) rhamnosus has some promise in reducing anxiety and improving microbial flora.
Overall, a picture of the gut microbiome playing a facilitating role between stress response, inflammation, and depression, and anxiety is emerging and should be considered with anyone suffering with anxiety, depression and for that case, any mental disorder.
As a final observation, there holds some promise that the natural product, KappArest from Biotics Research has been found to down-regulate interleukin 6 and tumor necrosis factor alpha reducing inflammation.
This new and emerging treatment for anxiety, depression and other psychiatric disorders is complex but promising. Although this presents a 180 degree approach to the neurotransmitter deficiency theory, it is worth considering and even embracing.