It does damage to your mouth m, the chemical used (usually glycine) gets both really hot quickly and cools down quickly. Any chemical besides oxygen is bad for your lungs but your lungs do a great job of cleaning out the other chemicals. Over time these chemicals begins to scar the teeny tiny places in your lungs where blood doesn’t go only oxygen can pass through. You can’t heal these areas so they’re scarred forever and you get less oxygen transfer possible. Nicotine changes the way you think and over long periods of time the physiological changes in your brain can’t be undone.
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