Isn’t our skin impermeable? How can these chemicals penetrate the skin? I don’t feel like believing you. This can be a mere supposition of the researches. I’m saying this because I constantly read the articles published by the researches and I haven’t seen this piece of information.
Not only bad things enter our skin but there are good elements too. The skin is not that permeable as you think, only certain things can penetrate the skin. So, there is nothing to worry about it.
Along with good elements some bad components can enter the skin too. We can keep on cleaning the skin to stop the ill effects of the components. Otherwise there is nothing that we can the skin is open anything in the environment.