The material on this website is backed by peer-reviewed clinical research by scientific institutions or universities. The specific references are available in the author’s book, Probiotics – Protection Against Infection: Using Nature’s Tiny Warriors to Stem Infection and Fight Disease.

For the preparation of this book, the author reviewed 933 human clinical studies and hundreds more in vitro and in vivo studies to arrive at the conclusions presented. The book itself references and discusses over 500 clinical studies and scientific reports.  The focus of the research referenced was upon human clinical studies.

The rationale for excluding most of the animal research is not only because animal research is cruel: Human clinical studies simply provide the clearest evidence of probiotics’ efficacy among humans. Animals typically host different species and strains of probiotic bacteria than do humans. The research indicates that different strains and species have different effects in different organisms. Therefore, the appropriation of effects from probiotics from mice to humans, for example, may be wholly inaccurate from a scientific perspective.