Autism, depression, brain health- linked to gut bacteria

child blackboard2There is now strong evidence that links conditions such as autism and depression to the the gut microbiome, i.e. the microorganisms that live in the gut. Recently, neuroscientists presented evidence for this link in a symposium at the Society for Neuroscience meeting in Washington DC called “Gut Microbes and the Brain: Paradigm Shift in Neuroscience”.

Earlier this year, Dr. Yik had written the article, “Autism (and other health conditions” linked to the gut?” and shared groundbreaking research studies with parents at a kindergarten school. Now, neuroscientists agree that intestinal microflora may influence the brain. “The immune system almost certainly plays a part”, says Sarkis Mazmanian, a microbiologist at the California Institute of Technology in Pasadena, “as does the vagus nerve, which connects the brain to the digestive tract. Bacterial waste products can also influence the brain- for example, at least two types of intestinal bacterium produce the neurotransmitter γ-aminobutyric acid (GABA).”

girls readingDr. Yik has discovered, when helping certain patients, that behaviour, mental health and digestive function improve dramatically after gut repair and replenishment treatment. She often uses the organic acids test (OAT) to first investigate intestinal microflora and bacterial waste products. Click here to read more about the organic acids test (OAT).


Abnormally high levels of certain intestinal micro-organisms have been linked to the following conditions:

  • Adrenal Fatigue
  • Alzheimer’s Disease
  • Anxiety and Related Disorders (including OCD)
  • Asperger’s Syndrome
  • Autism Spectrum Disorders
  • Celiac Disease
  • Chronic Fatigue
  • Colitis, Crohn’s Disease
  • Depression
  • Developmental Delays
  • Fibromyalgia
  • Gastrointestinal Disorders (including IBS, diarrhea or constipation)
  • Learning Disabilities
  • Multiple Sclerosis
  • Recurrent Infections (including recurrent cystitis, sinusitis, etc.)
  • Tic Disorders and Tourette (Tourette’s) Syndrome

It is quite common for people with these conditions to have concurrent digestive symptoms or immunity issues. If you want to do the simple OAT (urine test) to investigate the link between your gut and your health issues, click here to contact Dr. Yik.


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