Exposures during infancy are more significant for later health outcomes due to the critical developmental period.

“I don't know that baby skin is more perme I don't either I just to me it seems it seems like it' be hard to imagine it is but but babies do seem to have this incredible skin right their skin is so smooth and you want to squeeze their cheeks and all this kind of stuff but um yeah the idea they would be more permeable I think it's more that their development is this time is very important and setting the stage for a lot of what happens later versus in adulthood those stepwise developmental processes have already happened”