[Bonnyboy]

Originally Posted by MargaretR

The skin is not an impermeable barrier - think of nicotine patches -and many medicines are applied that way too

True, just depends how far you want to take this sort of thing. None of the day to day items we use can be said to be natural to our bodies, soap, fabric conditioners , washing powder etc. they must leave a residue in the fabric in contact with our skin.