does it need to be broken down in order for body to remove it?
Yes, for the most part. Some things we can't digest are shat out whole, but we don't shit out of our veins. To get things out of our veins, our immune systems break them down. Since white blood cells can't engulf and dissolve 2D sheets of graphene, it's lucky for us that nicotine dissolves it and breaks it up into bits and pieces our immune systems can handle.
Ah, OK, I'll add that to my couldren of thoughts, we'll I'm well stocked up on vapes now! Cos of the EU ban on disposables they practically giving them away here (uk)
My latest fave shop! Laws come into being on the 1st of June tho the ecig guys have been prepared for ages now, the laws, it seems to me won't make a jot of difference.
Still some bargains left, tho many other shops doing the same thing,
I like these guys.
https://ecigone.co.uk/collections/weekly-offers