There are generally two types of nicotine available for vapers: freebase nicotine and nicotine salt.
Nicotine salts are generally the same as freebase nicotine with the exception of an additional salt molecule at the molecular level.
This additional salt molecule results in a much smoother experience for users. For instance, when vaping a 20MG freebase nicotine juice vs a 20MG nicotine salt, the user will experience less harshness with nicotine salts despite having the exact same amount of nicotine in both vape juice
In order to ensure maximum safety when purchasing nicotine salts please ensure that you are always purchasing TPD compliant nicotine salts.
As nicotine salts come with pre-mixed nicotine, the sale of nic salts in the UK is highly regulated. In order to be authorised for sale, manufactures must put their juices through a series of tests governed by the Tobacco Products Directive.
Upon passing these tests, a juice then becomes TPD compliant and receives a unique ECID number that is then listed on the MHRA's website.