Compositions, systems and methods of improving the health of the microbiome of an individual's skin relate to the provision of skin contacting formulations containing beneficial bacteria, postbiotics, metabolites and other microbe components to foster the growth and maintenance of a healthy skin microbiome. One embodiment includes a topical application of Lactobacillus crispatus to ameliorate skin barrier damage and inflammation using unique combinations of probiotics, prebiotics, postbiotics, and other skin-beneficial ingredients, effectively treating inflammatory skin diseases, such as atopic dermatitis, psoriasis and acne, through the production of tryptophan metabolites that act as AHR agonists.