Photobiomodulation may significantly improve the microbiome

Photobiomodulation (PBM) significantly altered the microbial diversity of the microbiome, an effect most pronounced in mice treated three times per week with Near Infrared light (808 nm)

PBM produced a 10,000-fold increase in the proportion of the beneficial bacterium Allobaculum in the microbiota of mice after 14 days of treatment.

Preliminary research (unpublished) indicates a similar beneficial response in humans including increases in 3 beneficial bacterial species and decreases in the Firmicutes:Bacteroides ratio, a ratio proposed as an indicator of gut health.

"It is now recognized that a healthy gut microbiome is to a large extent responsible for a healthy individual.

Changes in the health status of humans and model organisms are accompanied by changes in the gut #microbiome."

Side note: In this Journal, the authors note the deleterious effects of ultraviolet light on the microbiome, but this may not be the case.

As of recently, Narrowband #Ultraviolet light shows beneficial modulation of microbiome in humans.