The skin has a strong absorption capacity and is the fastest way for substances to be absorbed and channeled into the bloodstream. Due to the large surface area, the quantities it can absorb are much larger than those passing through the other organs.
In Ayurvedic medicine and in ancient Greece therapeutic baths with healing oils, herbs and divine salts were used as daily medical practices.
Based on the above, you can imagine that in hot dirt conditions the absorption of the skin is particularly intense, since the rubbing of the skin with a sponge or exfoliating products removes the keratinocytes from the surface, thinning the stratum corneum, while increasing perspiration and skin temperature. Moreover, the increased humidity and the warm temperature of the atmosphere dilate the pores, making the skin even more receptive.
With all that said the skin is very vulnerable to whatever products we use to apply on the skin in the shower or bath and as it is particularly willing to absorb and filter unfiltered substances that it contains directly into the bloodstream so its very important to nourish the skin with good foods.