Probiotics – the good bacteria living in our guts – have a strong impact on the health of our skin. We have previously discussed two specific bacterial strains that have been scientifically shown to be efficient in treating seborrheic dermatitis (see the articles on lactobacillus paracasei and E. coli Nissle). In both cases the treatment consisted of orally ingesting the bacteria as a dietary supplement. However, starting around 2005, scientists have been investigating the effects of applying probiotics directly to the skin (instead of ingesting). Their results show that such an approach can treat various skin conditions, such as acne, rosacea, yeast and bacterial infections, psoriasis, and dermatitis1. Clinical study…