High pH extracted from tobacco leaves just like regular nicotine liquids, but with a bit of benzoic acid in the process to give it an extra bite to mimic traditional smoking .  Also nic salts are absorbed into the blood faster and give a more immediate effect, again similar to smoking.  Available in ranges from Salty 7mg to 33mg to 50mg(!).  We recommend small pod devices only for 33mg and above.  If you have a larger tank like a baby beast or other sub-om .5 or lower coil you want to stick with a 7mg strength.  Use at your own risk.  if over nicotine exposed, stop use, drink water, and don't operate heavy machinery