[cogman10]

Here's my reasoning.

The nicotine in smoke is bound to plant matter which you are likely to exhale. The dose you get is basically entirely from whatever gets stuck on the lungs, but even then it's still bound to the plant matter, so there will be some that just even if attached to the lung won't cross over.

Contrast that to the vape juice, which is water, glycol, nicotine (and flavors). In that case, the nicotine isn't bound to anything and as the water/glycol evaporates you are left with just the nicotine on the lung.

It's true that a large portion of the vape smoke doesn't attach to the lung at all. But my presumption is that a hit from a vape carries more nicotine and that nicotine also more readily gets absorbed by the lungs.

I don't know if it's exactly 10x. I presume it's higher.

[pandaman]

Vape juice is nicotine, glycol (PG) and glycerin (VG), the "V" in "VG" stands for "vegetable", which is a type of plant so if having a plant matter is a decisive factor in absorption then both delivery methods have it. It, however, depends on what you mean by "bound", from my limited knowledge nicotine is not bound chemically to anything in tobacco leaf either but perhaps water from plant cells has some properties which makes it very different from water from atomizing glycol and glycerin. And the concentration of nicotine in vape smoke is lower as I already shown with the numbers.