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Description
Those who vape daily would almost certainly meet the criteria for addiction

Retrieved 3 January 2018

This results in making the heartbeat slowly and with less force giving it time to recover

[69] Menthol cigarettes have been shown to inhibit nicotine metabolization, leading to increased systemic nicotine exposure and increased nicotine addiction
Portmann, K., Linder, A., Oelgarth, N

Yes, quitting improves lung and heart function over timethough some damage may persist
