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To help adult users to completely switch to alternative nicotine products, it is important the other alternatives provide effective nicotine delivery comparable or close to that of conventional/combustibles cigarettes 22,23

This only shows the theoretical nicotine content per puff in the liquid, not actual absorption

The analyses provided information about peripheral and central BP and heart rate 39 , and evaluated large arterial stiffness by measurements of central pulse pressure, FWA, and PWV 21,26,40

Propylene glycol in e-liquid enhances flavor and creates more of what users describe as a desired throat hit. Depending on individual tastes for flavor, throat hit, and amount of vapor, different proportions of vegetable glycerin and propylene glycol can be mixed for e-liquids

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