A clinical trial has found that Kerry Group’s probiotic strain Sporevia (Bacillus subtilis MB40) can eliminate Staphylococcus aureus in the human body by more than 95%.
Much more is known about how probiotics work in the gut, than for the skin, but it seems there are signals coming from gut micro-organisms to the skin and mucosa that may allow interaction between probiotics in the gut and effects on the skin.