How probiotics work and why they’re good for us

The Bioxyne Team

Christopher Campbell

Scientists now understand that the health of our gastrointestinal (GI) tract is vital to our health generally. Scientific studies have demonstrated that probiotics can directly influence our health primarily through their effects on the GI tract. These effects include:

  • helping to maintain a healthy balance of intestinal microbes,
  • preventing pathogenic microbes from inhabiting the intestinal tract,
  • boosting the general immune response through stimulating important immune areas located in the intestinal tract,
  • maintaining the health of the intestinal wall to stop bacteria getting through it and causing disease,
  • inhibiting cancer-associated enzymatic activity, and
  • nurturing the intestine’s ability to absorb healthy nutrients.

The health benefits of probiotics

Foods fermented by probiotic bacteria (think kimchee, yoghurt, sauerkraut) have for centuries been revered as health-giving, but it’s only in the last few decades that scientists have begun to compile solid scientific data that supports the association between probiotics and good health.

Have a look at the graph below to see the growth in scientific research on probiotics in the past 20 years.

(Source: NCBI PubMed)

While the association between gastrointestinal health and probiotics has been widely accepted, more recently we’re seeing a clear association between probiotics and immune health.

It’s important to note that unless a probiotic strain has been tested, we don’t really know if it has any health benefits.

Bioxyne’s probiotic PCC® has been scientifically and clinically tested in Australia. Through double-blind, placebo-controlled studies, PCC® has demonstrated clinical efficacy in:

  • reducing the incidence and severity of respiratory infections (colds) in infants and adults
  • reducing the symptoms of moderate to severe atopic dermatitis (eczema) in infants
  • boosting the effectiveness of the FluVax (flu vaccinations)
  • improving bowel function in adults.

This was part three of a four-part series about what probiotics are and why they’re good for you. Next up is ‘How to take your probiotics’.

Part one: What are probiotics

Part two: How probiotics are named


Name: Lactobacillus fermentum VRI-003

Nickname: PCC®

Origin: A human with robust gastrointestinal health

Career Objective: To boost gut and immune health of adults and infants through daily dosing of clinically trialled doses of PCC®.


University of New South Wales:

  • Certificate of High Survival in Stomach Acid and Bile
  • Certificate of Inhibition of Gastrointestinal Pathogens
  • Certificate of Binding to the Intestinal tract

Previous Experience in Humans:

2005: Clinical trial of PCC® showing improvement in symptoms of moderate to severe atopic dermatitis in infants

2008: Clinical trial of PCC® showing reduction in symptoms of respiratory tract infections in elite male athletes

2009: Clinical trial of PCC® showing boost in the immune response to the flu vaccine

2011: Clinical trial of PCC® showing reduction in symptoms of respiratory tract infections in elite male athletes

All of these trials confirmed that PCC® is safe for children and adults

Current Experience in Humans:

2016- present: Clinical trial of effect of PCC® on the gut microbiome of healthy adults

Current Employment:

  • Bioxyne Limited. Active ingredient in:
    • proTract® for Atopic Dermatitis
    • Progastrim® for gut health, and
    • Progastrim® + Vitamin C for colds
  • Pharmanex (NuSkin). Active ingredient in:
    • ProBioPCC

Contact details:


Dr Peter French, Director of Science, Bioxyne Limited, Sydney

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