Studies have found that, despite constant environmental changes, the skin microbiome is largely stable over a two-year study period. On the whole, we maintain our particular strains, rather than acquiring new ones from our surroundings. This is perhaps not surprising, given that the skin microbiome extends well below the surface. As our skin sloughs off at the stratum corneum, we will be continuously seeding our preferred microbial partners from below.
So, to some extent, you’re stuck with the skin you’re in.