In a previous post we have discussed probiotics (bacteria living in our gut) as a promising treatment for seborrheic dermatitis. That post mainly focused on the l. paracasei bacterium and its positive effects. In this post I want to briefly discuss a recent study1 that shows that oral ingestion of another probiotic, known as Escherichia coli Nissle, is very effective for treating seborrheic dermatitis. Facial dermatoses, including seborrheic dermatitis, are often associated with gastrointestinal diseases2. The mechanism by which intestinal diseases induce skin issues is not known. It is known however that intestinal-borne dermatoses are accompanied by a shift of gut bacteria population towards more aggressive types. Due to their…