This is why people say that dowsing yourself every single day in hard water and bottles of chemicals intended to make the opposite sex fly to you like iron filings to a magnet is not good for your immune system. Here is the connection. If that’s your norm you can be wreaking ecological havok on the populations of good bacteria like S. epidermidis.
This paper takes previous observations that commensal bacteria can have an anti-inflammatory role in the skin one step further and shows how these organisms can affect T-cell maturation
Basically, we kinda knew it mattered before, but now we see more of the mechanism. So now there is the gut microbiome to hack and the skin microbiome. Inside and out.