That's not entirely true. It depends on the size of the molecule whether it will penetrate the epidermis or dermis. Ever wonder why all the 10 tens of thousands of car mechanics of my age (67), including me are not flopping around on their shop floors?
I'm not buying that talc is the causality. Every Boomer and their Gen X kids were exposed to talc every time their diapers were changed. Why are we not dropping like flies?
This is just more junk science like the Alacar scare back in 70's. Everybody dies. Everybody drinks water. Therefore water causes death. I know, a silly example, but you get my point. Eggs were deadly to the human heart. Now eggs are okay. First it was fats, then cholesterol (which the liver produces), now it's tryglicerides. Better one: charred meat will kill you. Best: second-hand smoke will kill you, even from the next story down blowing into your window. Pfft.
Another example: Coffee causes cancer.
No wait: Now coffee PREVENTS cancer.